Sandra Smith

Sandra Smith


amin

Posted: 23 Nov 2018 02:04 AM PST

1
AMIN
1. Công thc tng
quát ca amin no, đơn chc, mch hdng là
A.C
n
H
2n+3
N. B. C
n
H
2n+2+k
N
k
. C. C
n
H
2n+3
NH
2
. D. C
n
H
2n +1
N.
2. Trong các amin sau : (A) C
H
3
CH(CH
3
)NH
2
; (B) H
2
NCH
2
CH
2
NH
2
; (D) CH
3
CH
2
CH
2
NHCH
3
Chn các amin bc 2 và gi đúng tên?
A. A : propylamin. B. A và B ; A : isopropylamin ; B : 1,2-etanđiamin.
C. D : metylpropylamin. D. B : 1,2- điaminopropan
3. Trong các cht dưới đây, c
ht nào là amin bc 1 ?
A. H
2
N(CH
2
)
6
NH
2
. B. CH
3
CH(CH
3
)NH
2
. C. CH
3
NHCH
3
. D. C
6
H
5
NH
2
.
4. Ancol và amin nào sau đây
cùng bc ?
A. (CH
3
)
3
COH và (CH
3
)
3
N. B. CH
3
CH(NH
2
)CH
3
và CH
3
CH(OH)CH
3
.
C. (CH
3
)
2
NH và CH
3
OH. D. (CH
3
)
2
CHOH và (CH
3
)
2
CH-NH
2
.
5. Có bao nhu cht đồng
phân có cùng công thc phân t C
4
H
11
N ?
A. 4. B. 6. C. 7. D. 8.
6. Trong các tên gi dưới đây
, tên nào phù hp vi cht CH
3
CH(CH
3
)NH
2
?
A. metyletylamin. B. etylmetylamin. C. isopropanamin. D. isopropylamin.
7. Trong các tên gi dưới đây
, tên nào phù hp vi cht C
6
H
5
CH
2
NH
2
?
A. phenylamin. B. benzylamin. C. anilin. D. phenylmetylamin.
8. Để làm
sch l thu tinh đựng anilin người ta dùng hoá cht nào sau đây ?
A. Dung dch NaOH. B. HCl.
C. Nước brom. D.Dung dch phenolphtalein.
9. Metylamin
không phn ng vi cht nào sau đây?
A. HCl. B. H
2
SO
4
.
C. NaOH. D. Qu tím.
10. Dãy gm
các cht đều làm qu tím m chuyn sang màu xanh là
A. anilin, metyl amin, amoniac B.amoni clorua, metyl amin, natri hidroxit
C. anilin, aminiac, natri hidroxit D. metyl amin , amoniac, kalihiđroxit.
11. Để tái to li an
ilin t dung dch phenyl amoniclorua phi dùng dung dch cht nào sau đây :
A. Dung dch HCl B. Dung dch NaOH C. Dung dch Br
2
D. C A, B, C
12.
Có th dùng hóa cht nào sau đây để ra sch l đã đựng anilin?
A. H
2
O. B. dd NaOH. C. dd HCl. D. Thuc tím.
13. Cht khô
ng làm đổi màu quì tím m là
A. CH
3
COOH. B. CH
3
NH
2
. C. C
2
H
5
NH
2
. D. C
6
H
5
NH
2
.
14. Phát biu nà
o sai?
A. Amin càng nhiu nguyên t C trong phân t thì nhit độ sôi càng cao.
B. Các amin đều độc và d tan trong nước.
C. Metylamin, đimetylamin, trimetylamin là nhng cht khí, mùi khai.
D. Anilin là cht lng, không màu nhưng để lâu trong không khí thì hóa đen.
15. Khng
định nào sai?
A. Trong phân t anilin, gc phenyl làm gim lc bazơ ca nhóm amino.
B. Trong phân t metylamin, gc metyl làm tăng lc bazơ ca nhóm amino.
C. Nh nh hưởng ca nhóm amino, anilin d cho phn ng vi dung dch brom.
D. Nh nh hưởng ca gc phenyl, anilin có lc bazơ mnh hơn amoniac.
16. Gii
pháp nàp sau đây không hp lí?
A. Ra l đựng anilin bng axit. B. Kh mùi tanh ca cá bng gim ăn.
C. Phân bit dd CH
3
NH
2
và dd NH
3
bng qu tím. D. Phân bit anilin và metylamin bng quì tím m.
Câu hi lý thuyết & bài tp amin- Căn bn 2

17. Phát biu nào sau đây đúng?
A. Anilin có kh năng làm quì tím hóa xanh. B. Anilin trong nước thành dung dch bazơ mnh.
C. Anilin có lc bazơ mnh hơn amoniac. D. Anilin có kh năng làm mt màu dung dch brom.
18.
Kết qu so sánh lc bazơ nào sau đây đúng?
A. CH
3
NH
2
< NH
3
. B. C
6
H
5
NH
2
> NH
3
.
C. NaOH < NH
3
.
D. C
6
H
5
NH
2
< CH
3
NH
2
.
19. Sp xếp
các amin theo th t bc amin tăng dn : etylmetylamin (1) ; etylđimetylamin (2) ; isopropylamin (3).
A. (1), (2), (3). B. (2), (3),(1). C. (3), (1), (2). D. (3), (2), (1).
20. Chn c
ht có lc bazơ mnh nht trong các cht sau:
A. anilin. B. điphenylamin. C. amoniac. D. metylamin.
21. Chn c
ht có lc bazơ yếu nht trong các cht sau:
A. anilin. B. đimetylamin. C. etylamin. D. metylamin.
22. Lc
bazơ tăng theo th to sau đây?
A. CH
3
NH
2
< NH
3
< C
6
H
5
NH
2
. B. NH
3
< CH
3
NH
2
< C
6
H
5
NH
2
.
C.C
6
H
5
NH
2
< NH
3
< CH
3
NH
2
. D. C
6
H
5
NH
2
< CH
3
NH
2
< NH
3
.
23. Hp cht Y
là mt amin đơn chc cha 19,18% N theo khi lượng. Y có công thc phân t
A.C
4
H
5
N B.C
4
H
7
N C.C
4
H
9
N D.C
4
H
11
N
24. Đốt ch
áy mt amin X đơn chc no, thu được và có t l s mol nCO
2
:nH
2
O = 2:5 . Amin X có tên gi là:
A.Etyl amin B. Metyl etyl amin C. Trimetyl amin D.Metyl amin.
25. Đốt
hoàn toàn 5,9 gam amin no-đơn-h X thì thu được 1,12 lít N
2
(đktc). X có bao nhiêu đồng phân?
A. 2. B. 4. C. 8. D. 3.
26. Để trun
g hòa 50 ml dd metyl amin cn 40 ml dd HCl 0,1 M . C
M
ca metyl amin đã dùng là
A.0,08M B.0,04M C.0,02M D.0,06M
27.
Để trung hòa 250 ml dd metylamin xM cn dùng 500 ml dd HCl 0,5M. Giá tr ca x là
A. 0,5. B. 1. C. 0,75. D. 0,6.
28.
Để trung hòa 200 ml dd H
2
SO
4
0,2M cn dùng bao nhiêu ml dung dch metylamin 0,1M?
A. 400 ml. B. 200 ml. C. 800 ml. D. 300 ml.
29.
Trung hòa 200 ml dung dch metylamin 1M bng dung dch HCl s to ra bao nhiêu gam mui?
A. 13,5 gam. B. 27 gam. C. 5,4 gam. D. 3,1 gam.
30.
Trung hòa V ml dung dch metylamin 0,2M bng dung dch HCl thì to ra 16,2 gam mui. Giá tr ca V là
A. 1200. B. 120. C. 60. D. 600.
31.
300gam dung dch anilin tác dng vi nước brom thì thu được 9,9gam kết ta trng. Nng độ phn trăm ca
anilin trong dung dch là
A. 0,02%. B. 0,0372%. C. 0,93%. D. 7,32%.
32. Cho các dung dch: C
6
H
5
NH
2
(anilin), CH
3
NH
2
, NaOH, C
2
H
5
OH và H
2
NCH
2
COOH. Trong các dung dch trên,
s dung dch có th làm đổi màu phenolphtalein là
A. 4 B. 2 C. 3 D. 5

Here are our favorite Dyson products

Posted: 22 Nov 2018 07:02 PM PST


Dyson doesn't just make high-end vacuums anymore. The company branched into other categories a while ago.

Started by James Dyson back in 1991, the British company has since created several household products that innovate through the use of air. Its current line includes fans, air purifiers, hair dryers, and even a hair styling device.

Here's a list of our favorite Dyson products that would make great holiday gifts. Each are solid contenders for the "gift that keeps on giving" award.

Pure Cool Air Purifier

This device isn't for everyone, but it's rife with benefits that anyone can use. The Pure Cool Air Purifier is similar to the other tall oval like fans that Dyson has become known for. This one's different, though – not only can it blow out cool air, but it can also clean the air.

From smog to pollen, it can help take impurities out of the air to help you breathe better. If you suffer from allergies or have issues with the air quality inside your home, you might want to add it to your holiday wishlist.

Plus, it isn't a home appliance you need to constantly ping. It's app connected, but after setup, you're pretty much golden – that is, until you have to replace the filter.

Dyson Supersonic Blow Dryer


Sure, a regular old blow dryer gets the job done, but it's nowhere near as cool as the Dyson Supersonic Blow Dryer. It's a lot more expensive than a traditional dryer at $399.99, but there's good reason for that. 

Unlike regular hair dryers that turn up the heat without much regulation, the Supersonic intelligently metes out heated air in a much safer way. It doesn't burn your hair and works to minimize damage. It also looks really sleek, with an aluminum finish that comes in several colors.


The most recent product from Dyson is a reinvention of the curling iron. Rather than making the user wait for it to heat up and risk injury, the AirWrap uses air to curl hair. Yes, it pushes out air to curl your hair. It may sound crazy, but it's actually really cool. 

While we've had mixed results, it's definitely a viable option for anyone with luscious locks looking for a new way to style them. It's pricey, with a price tag close to $499. But the tech inside is as high-end as it comes, as it can blow air at 110,000 RPM.

Dyson Cycle V10


Of course, no Dyson gift guide is complete without an actual vacuum – it's the category that put the company on the map, after all. The Dyson Cyclone V10 is an expensive and excellent handheld vacuum. It packs a punch with its proprietary technology. 

Like all other Dyson vacuums, it's a bagless unit. That means no-mess clean-ups, and less costly bag purchases. Even better, thanks to different nozzle attachments, it can also work as an upright vacuum in addition to acting as a handheld.


See Also: Try Amazon Prime 30-Day Free Trial

Pinch us, we're dreaming: The 8-quart Instant Pot LUX is on sale for $59 for Black Friday

Posted: 22 Nov 2018 06:39 PM PST


If you missed out on Walmart's great deal on the 6-quart Instant Pot LUX back in July, we'll do you one better: The 8-quart model is on sale for Black Friday and it's only $59.

The 6-in-1 Instant Pot LUX usually goes for $99.99, which means you'll be saving $40 on the largest model in the LUX line. Somebody pinch us because we're dreaming.

SEE ALSO: Try Amazon Prime 30-Day Free Trial

The Instant Pot LUX programmable cooker is the most "basic" of the Instant Pot fam — though basic is far from accurate considering the number of things this puppy does. The LUX combines the functions of six appliances: It's a pressure cooker, slow cooker, rice cooker, steamer, warmer, and sauté pan, and is one of two Instant Pots that does not make yogurt. But like, who needs to make yogurt that often, anyway?

It also features 12 built-in smart programs: Bean/chili, meat/stew, soup/broth, sauté, poultry, steam, congee, multigrain, rice, pressure cook, warm, and slow cook (which are also available in all other models).
Regularly $99.99, you can save $40 and snag the Instant Pot LUX for $59 during Walmart's epic Black Friday sale here. (Confused about the difference between all of the Instant Pot models? So is everyone else. Check out our "Which Instant Pot should you buy?" guide here.)
Instant Pot LUX 6-quart — $59

Black Friday 2018: Save up to $100 on select Sonos wireless speakers at Amazon

Posted: 22 Nov 2018 06:31 PM PST


If you want to give the gift of amazing home audio, then Black Friday and Cyber Week are your best chances to save with this amazing sale on Sonos speakers that's designed to bring your music, podcasts, and movies to life.

Sonos is offering up to $100 off three of their top smart speakers for the shopping holiday. You can save on the Sonos One for the bedroom, living room or kitchen, the Sonos Beam to boost the audio on your TV, and the Sonos Sub for home audio receivers and speakers.

All of these speakers from Sonos that are on sale for Black Friday are completely wireless via Bluetooth, as well as internet enabled, so you can connect them to smartphones, laptops, and even each other for deeper and richer audio experiences throughout your home. If you're struggling to listen to what's on TV, or you'd like to fill your home with music and podcasts, then Sonos might be a good solution for you, or as a gift for the holidays.

This sale runs through Nov. 26, 2018, so take advantage of these deals before they go away.

Sonos One — $174.00 (list price $199.00)



Get the most out of your audio with the Sonos One, an all-in-one device that works as a powerful Bluetooth speaker and smart home hub with Amazon Alexa voice assistant. Sync your iOS or Android device to play music from Amazon Music, Spotify, Pandora, iHeartRadio, TuneIn, and SiriusXM, or control all of your smart home devices with just your voice. Save $25 on the Sonos One for Black Friday with the sales price of $174.00.

Sonos Beam — $349.00 (list price $399.00)




Want an immersive movie watching experience at home? The Sonos Beam is a world-class soundbar that transforms the muddy audio from a TV into a detailed and rich listening experience. This Sonos is also smart, so you can use your voice to control your TV and attached streaming devices via Amazon Alexa for completely hands-free use. The Sonos Beam is also Apple compatible for Apple AirPlay for iOS devices like the iPhone XS and the Apple iPad Pro.

You can save $50 on the Sonos Beam and get one for $349

Sonos Sub — $599.00 (list price $699.00)

Bring your entire Sonos collection together with the Sonos Sub. This is one of the very few smart subwoofers with rich audio for a detailed and heart-thumping listening experience. The speaker doesn't require a cabinet, thanks to Sonos' force-cancelling speaker drivers for face-to-face positioning that offers deep bass with zero rattling or buzz.


Save $100 on the Sonos Sub for Black Friday and pick one up for just $599

SEE ALSOTry Amazon Prime 30-Day Free Trial


Amazon doesn't have much to say about its customer data leak

Posted: 22 Nov 2018 06:07 PM PST



Amazon thinks it's already said more than enough, thank you very much.

Starting on Nov. 20, the Seattle-based behemoth began notifying an unknown number of customers via email that, well, something had happened to their data. Specifically, that those customers' names and email addresses had been "disclosed." But anything beyond that? Haha wouldn't you like to know.

The company declined to comment when asked by Hocdethi how many customers were affected, what caused the leak, when the leak was discovered, when it was fixed, and to whom or to what the customer data was disclosed.

What Amazon did tell customers isn't very helpful at getting to the bottom of this data leak mystery.

"We're contacting you to let you know that our website inadvertently disclosed your email address due to a technical glitch," read one such notification posted to Twitter. The Register confirmed that the contents of the email are genuine.

The email went on to explain that "there is no need for you to change your password or take any other action."





An Amazon spokesperson told Mashable over email that the company had "fixed the issue and informed customers who may have been impacted."

However, the spokesperson declined to elaborate on just what exactly the "issue" was.

That Amazon won't tell customers how it exposed their data doesn't reflect well on a company that wants to put a live microphone in those same customers' homes.

Apple restarts iPhone X production following weak iPhone XS and XS Max sales, report says

Posted: 22 Nov 2018 05:56 PM PST


We didn't see this coming!

Apple is restarting production of the iPhone X due to weak sales of the iPhone XS and XS Max, according to a Wall Street Journal report.

Both the iPhone XS and XS Max debuted in September to much ballyhoo, and both phones have received favorable reviews; however, it seems that now the newest iPhones are not selling quite as fast as Apple originally projected.

This surprising development comes just days after Apple reportedly cut production orders for all three 2018 iPhone models (i.e. the iPhone XS, iPhone XS Max, and iPhone XR).

The decision to restart iPhone X production is due in part to an agreement Apple made with Samsung to purchase a certain amount of OLED display panels, according to the WSJ.

Apple is also reportedly using the iPhone X to make up for lost sales of the iPhone XS and XS Max. The report claims that the older iPhone model is cheaper to produce because the components and manufacturing equipment are now older and therefore cheaper.

Nonetheless, the decision is a little strange because, in January, Apple cut production of the iPhone X in half from 40 million to only 20 million units. Major markets in the U.S., China, and Europe were to blame for the sluggish sales after an initial buzz following the iPhone X's release in Nov. 2017.

But Apple has been especially challenged by the iPhone XR model's weak sales. In late October, Apple cut its production plan by about one third according to a separate Wall Street Journal report. Now, Apple is slashing the price of the iPhone XR in Japan to boost sales.

Still, even with all of its recent woes, Apple remains one of the strongest brands in the world. A recent survey found that Apple customers are some of the most loyal of any tech brand, with many upgrading to newer iPhones when theirs become old. But a big question remains for the smartphone giant: Is anyone compelled to buy the new models?

Trump calls midterms a ‘TREMENDOUS VICTORY’ in interview with Chris Wallace [Full video]

Posted: 22 Nov 2018 05:52 PM PST

Chris Wallace is one of the best in the business of interviewers, and he brings his a-game to this interview of President Trump.


Pathetic liberal loser ATTACKS Trump supporters at CNN hq

Posted: 22 Nov 2018 05:52 PM PST

Another liberal attack on Trump supporters was caught on video over the weekend, but it's almost laughable because the guy is so pathetic.
Watch below:



Apparently this is at a protest against CNN offices in Atlanta, Georgia. The pathetic liberal loser was arrested for disorderly conduct, even though the Trump supporter he attacked declined to press charges.
While the attack is heinous and cowardly, I also worry about a generation of pathetic men who don't even know how to throw a punch. Sheesh. 

Judge BLOCKS Trump proclamation on migrant mob

Posted: 22 Nov 2018 05:52 PM PST

A judge appointed by Obama has blocked Trump's proclamation on the migrant mob that said if they cross illegally they won't be eligible for asylum.




Of course:
FOX NEWS – A federal judge in San Francisco on Monday barred the Trump administration from refusing asylum to immigrants who cross the southern border illegally, likely prompting a legal challenge from the White House.
Trump issued a proclamation on Nov. 9 that said anyone who crossed the southern border would be ineligible for asylum.
U.S. District Judge Jon S. Tigar, who was nominated by President Obama in 2012 to the U.S. District Court for the Northern District of California, issued a temporary restraining order after hearing arguments in San Francisco.
The request was made by the American Civil Liberties Union and the Center for Constitutional Rights, which quickly sued after President Trump issued the ban this month in response to the caravans of migrants that have started to arrive at the U.S.-Mexico border.
Baher Azmy, a lawyer for the Center for Constitutional Rights, said, "Individuals are entitled to asylum if they cross between ports of entry. It couldn't be clearer."
An estimated 70,000 people a year claim asylum between official ports of entry, including in the Arizona desert and on the north bank of the Rio Grande in Texas, according to the Department of Homeland Security.
Migrants who cross illegally are generally arrested and often seek asylum or some other form of protection.
Everything Trump does gets challenged by the courts. And I would expect that the DOJ to challenge this decision in the courts pretty soon, especially given that the migrant mob is already at the border. 

BOOM! Florida Democratic Party under investigation for ELECTION FRAUD

Posted: 22 Nov 2018 05:52 PM PST

Remember when we told you about the 'cure' affidavit forms sent out by Florida Democrats AFTER the election deadline, in hopes they could convince a judge to accept the forms anyway?
Well they are now under investigation for election fraud:



WCTV – Democrats conceded in the races for U.S. Senate and governor, but not before Florida asked federal authorities to investigate possible election fraud conducted by the party.
The U.S. Department of Justice declined, but the Florida Department of Law Enforcement and the Office of Statewide Prosecution say they have an opened a criminal investigation into the allegations.
Evidence reported to the Department of State suggests a possible effort by Democrats to have voters fix ballots after the state's deadline in at least four counties.
Cure forms for mail ballots sent to voters by the party show the return date changed from the day before the election to two days afterwards.
Democratic strategist Steve Schale says it was likely just a mix up.
"Some 23-year-old staffer probably got two dates mixed up," said Schale. "They put the date down for the provisional ballot cure, not the absentee ballot cure, and actually by doing it, all they did was make it harder for their own voters to vote."

Those 23-year-old staffers are so stupid…they mix up stuff all the time!
Yeah, right. Give me a break.
Republicans point to the fact Democrats successfully sued to extend the deadline after the fact.
"It looks like they were just planning on a judge siding with them because of the bias towards trying to allow as many votes as possible to count that were legally cast," said Eric Eggers, author of the book Fraud. "It's the first evidence we have of systemic efforts to undercut or subvert election law as it was on the book."
Supervisors of elections who brought the changed forms to the state's attention say even if it was just a mix up, official elections forms should never have been altered.
Exactly. What business did they have altering official election forms in the first place if they weren't trying to commit some kind of election fraud. It's ridiculous on its face to pawn it off as a careless mistake by some no-name 23-year-old. 

Nancy Pelosi is in SERIOUS trouble…

Posted: 22 Nov 2018 05:52 PM PST


Last week we reported on a group of 17 that were going to release a letter stating they would not vote for Nancy Pelosi as Speaker. Well they released it, but it turns out to be only 15.
15 happens to be the most votes that Pelosi can afford to lose if she wants to be Speaker. Any more than that and she's done.
A CNN congressional reporter, hailed as one of the best in the business, explains what's going on behind the scenes and says she knows of at least 3 more Democrats who will vote against Pelosi that didn't want to be associated with the 'rebels' who signed the anti-Pelosi letter.



As I said before, whoever they get to replace Pelosi won't be any better than Pelosi, at least from our perspective. But, should that happen, it will be fun watching the old leftist get humiliated in front of her party.