Q:

Silver Mirror test is given by which one of the following compounds?

1. Benzophenone

2. Acetaldehyde

3. Acetone

4. Formaldehyde

A) Only 1	B) Only 2
C) 1 and 3	D) 2 and 4

Answer & Explanation Answer: D) 2 and 4

Explanation:

Both Formaldehyde and Acetaldehyde will give this test

$H C H O \overset{[A g (N H_{3})_{2}^{+}]}{\to} \overset{A g}{S i l v e r m i r r o r} + O r g a n i c c o m p o u n d$

$C H_{3} - C H O \overset{[A g (N H_{3})_{2}^{+}]}{\to} \underset{S i l v e r m i r r o r}{A g} + O r g a n i c c o m p o u n d$

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72 271824

Q:

Rearrange the parts of the sentence in correct order.

Sociologists believe

P : that the reason why honour killings

Q : of the continued rigidity of the caste system

R : continue to take place is because

A) PRQ	B) RQP
C) QRP	D) PQR

Answer & Explanation Answer: A) PRQ

Explanation:

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39 268456

Q:

The maximum number of electrons that can be accommodated in a shell depends on the formula

A) 1n2	B) n2
C) 3n2	D) 2n2

Answer & Explanation Answer: D) 2n2

Explanation:

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21 262282

Q:

Select the synonym of

sentry

A) bandit	B) competitor
C) sentinel	D) foe

Answer & Explanation Answer: C) sentinel

Explanation:

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0 255611

Q:

which of the following are chemical changes?

A) Cooking of Food

B) Digestion of Food

C) Freezing of water

D) Water is heated up

A) A & B	B) A, B & C
C) C & D	D) All the above

Answer & Explanation Answer: A) A & B

Explanation:

A) Cooking of Food ------ Chemical Change

B) Digestion of Food ----- Chemical Change

C) Freezing of water ----- Physical Change

D) Water is heated up ---- Physical Change

because here the chemical composition of the substance changes in A & B only.

Since we know that, If the chemical composition is changing then it is a chemical change and if the chemical composition is remaining the same, then it is a physical change.

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26 253086

Q:

Read each sentence to find out whether there is any error in any part

That Brutus, who was his trusted friend(a) had attacked on him(b) caused heartbreak to Julius Caesar(c). No error.(d)

A) a	B) b
C) c	D) d

Answer & Explanation Answer: B) b

Explanation:

‘Attacked on him’ is the incorrect form of phrasal verb that needs to be replaced with ‘Attacked him’ to make the sentence correct. This is because; ‘Attack’ is not followed by any preposition. Thus, the correct sentence would be, ‘That Brutus, who was his trusted friend had attacked him caused heartbreak to Julius Caesar’.

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1 252496

Q:

Select the antonym of

intrinsic

A) elemental	B) innate
C) connate	D) accquired

Answer & Explanation Answer: D) accquired

Explanation:

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3 250224

Q:

Select the antonym of

diligence

A) lethargy	B) exertion
C) vigour	D) assiduity

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