GATE Questions

Q:

When Ionic bonds are formed metallic atoms tend to

A) share electrons B) gain electrons
C) lose electrons D) None of above
 
Answer & Explanation Answer: C) lose electrons

Explanation:

Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

 

Hence, when Ionic bonds are formed metallic atoms tend to lose electrons and become positive ions

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Q:

Race : Fatigue :: Fast : ?

A) Hunger B) Appetite
C) Weakness D) Food
 
Answer & Explanation Answer: A) Hunger

Explanation:

Race : Fatigue :: Fast : Hunger

The first word causes the second.

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Q:

That which cannot be corrected

A) Incorrigible B) Illegible
C) Illegal D) Indelible
 
Answer & Explanation Answer: A) Incorrigible

Explanation:

The One-word substitute for That which cannot be corrected is Incorrigible.

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Q:

Nuclear Fission is caused by the impact of

A) Electron B) Neutron
C) Proton D) Deutron
 
Answer & Explanation Answer: B) Neutron

Explanation:

In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.

 

Thus, The Nuclear Fission is caused by the impact of Neutrons.

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Q:

A showroom on its anniversary gives a discount of 18% on marked price of bikes. Raghuram purchases a bike in Rs. 54,540. What is the marked price of bike?

A) Rs. 63548 B) Rs. 66512
C) Rs. 65000 D) Rs. 67857
 
Answer & Explanation Answer: B) Rs. 66512

Explanation:

The discount offered by showroom = 18%

Raghu purchased at Rs. 54540

Then,

The marked price is given by 

54540 x 100/82

=~ Rs. 66,512

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Q:

Which of the following is malleable?

A) Ice B) Gold
C) Stone D) Pottery
 
Answer & Explanation Answer: B) Gold

Explanation:

Here in the given options, Gold is a malleable substance.

Malleable substance means a metal or a material able to be hammered or pressed into shape without breaking or cracking. i.e, tensile.

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Q:

The carbon tetrachloride molecule (CCl4) is

A) a nonpolar molecule with polar bonds B) a nonpolar molecule with nonpolar bonds
C) a polar molecule with polar bonds D) a polar molecule with nonploar bonds
 
Answer & Explanation Answer: A) a nonpolar molecule with polar bonds

Explanation:

The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is cancelled by the symmetric tetrahedral shape. Hence, making the net dipole as zero and molecule as non-polar.

 

When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes polar.

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Q:

Which of the following metal is generally used for making filaments of bulb?

A) W B) Ag
C) Fe D) Rh
 
Answer & Explanation Answer: A) W

Explanation:

W is the symbol for chemical element Tungsten or Wolfram.

It is used in making filaments of bulbs.

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