Questions

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 196998
Q:

Burning Magnesium ribbon produces white ash, which dissolves in water to form____.

 

A) Magnesium Halides B) Magnesium Oxide
C) Magnesium Hydroxide D) Magnesium Sulphate
 
Answer & Explanation Answer: C) Magnesium Hydroxide

Explanation:
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5 196816
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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16 195665
Q:

Arrange the continents from largest to smallest?

A) Africa
B) Europe
C) North America
D) Asia
E) Australia
F) South America
G) Antarctica

A) D,A,C,F,G,B,E B) A,C,B,F,E,D,G
C) D,B,F,C,G,A,E D) E,A,C,D,G,F,B
 
Answer & Explanation Answer: A) D,A,C,F,G,B,E

Explanation:
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10 188611
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

 HCHO[Ag(NH3)2+]    Silver mirrorAg + Organic compound

 CH3-CHO [Ag(NH3)2+] AgSilver mirror+ Organic compound 

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66 183553
Q:

The Central Excise Day (CED) is celebrated on which date in India ?

 

A) February 24 B) February 22
C) February 21 D) February 27
 
Answer & Explanation Answer: A) February 24

Explanation:

The Central Excise Day (CED) is celebrated every year on February 23 in India to commemorate the enactment of the Central Excise and Salt Act, 1944. The Central Excise officers all over the country celebrate this day by organizing seminars, workshops, trade interactions and cultural events etc.

 

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19 182716
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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12 182615
Q:

Crack the code & Unlock the Key ?

16939430_1229474037159698_4440410928025505694_n1499418020.jpg image

A) 062 B) 602
C) 042 D) 204
 
Answer & Explanation Answer: C) 042

Explanation:

From all the hints given, 

only 042 satisfies and it unlocks the key.

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1260 180739