Questions

Q:

The element common to all acids is

A) Hydrogen B) Oxygen
C) carbon D) Sulphur
 
Answer & Explanation Answer: A) Hydrogen

Explanation:

Hydrogen is the common element in all acids.

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Q:

The World Food Prize is given by which of the following Organisations/World bodies

A) UNICEF B) Kraft general foods
C) FAO D) UNDP
 
Answer & Explanation Answer: B) Kraft general foods

Explanation:
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Q:

Which ionization process requires the most energy?

A) C3+ (g) → C4+ (g) + e- B) C (g) → C+ (g) + e-
C) C2+ (g) → C3+ (g) + e- D) C+ (g) → C2+ (g) + e-
 
Answer & Explanation Answer: A) C3+ (g) → C4+ (g) + e-

Explanation:

We know that each successive IE is greater than the previous one, because each ionization process removes one electron and hence increases the total attractive force on the remaining electrons from the nucleus. Hence, C3+ (g) → C4+ (g) + e- needs more energy.

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Q:

What is the maximum number of triggers, can apply to a single table?

A) 8 B) 10
C) 12 D) 14
 
Answer & Explanation Answer: C) 12

Explanation:

Maximim number of triggers that can be applied to a single table is 12

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Q:

If an empty cylinder is half filled with a liquid, its center of gravity is 

A) shifted upwards B) shifted downwards
C) shifed neither upward nor downward D) shifted upward or downward depending on the density of the liquid
 
Answer & Explanation Answer: B) shifted downwards

Explanation:

Effect of adding liquid is to make the cylinder more bottom heavy which is a more stable position

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Q:

Saliva contains an Enzyme called

Answer

Amylase, also called Ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine is the Enzyme present in Saliva.

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Q:

In India, which festival coincide with the festivals of Songkran in Thailand, Thingyan in Myanmar and Aluth Avurudda in Sri Lanka ?

A) Guru Poornima B) Makar Sankranti
C) Holi D) Baisakhi
 
Answer & Explanation Answer: D) Baisakhi

Explanation:

The harvest festival of Baisakhi popularly celebrated in North India coincides with the Songkran festival of Thailand, the Thingyan in Myanmar and the Aluth Avurudda in Sri Lanka. In all the latter three festivals, the coming of a New Year is the central theme and involves various indigenous ways of celebrations.

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Q:

Metals are good conductors of electricity because

A) The atoms are lightly packed B) They contain free electrons
C) They have high melting point D) All the above
 
Answer & Explanation Answer: B) They contain free electrons

Explanation:

Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.

Because the electrons in the atom's higher energy levels can separate from the atoms easily, they can be pulled out with very little energy. Because the molecular structure of the metal is such that 'free electrons' are free to move, thus being categorized as electrically conductive.

 

For example, copper is used for electrical wiring because it is a good conductor of electricity.

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