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NDA Exam Pattern, NDA Questions with Answers Page 8

(#M40026887) NDA QUESTION General Ability Test-2012 Keep an EYE

Deionised water is produced by
(A) Calgon process (B) ion-exchange resin process
(C) Clark's process (D) Permuit process

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(#M40026886) NDA QUESTION General Ability Test-2012 Keep an EYE

Which one among the following is the equivalent with of sulphuric acid ?
(Atomic weight : H = 1, S = 32, O = 16)
(A) 98 (B) 60 (C) 100 (D) 49

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(#M40026885) NDA QUESTION General Ability Test-2012 Keep an EYE

Three elements Na, S and O combine to from a compound Na2SO6. What is the valency of S this compound ?
(A) 2+ (B) 4+ (C) 6+ (D) 8+

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(#M40026884) NDA QUESTION General Ability Test-2012 Keep an EYE

Which one among the following equations is correctly balanced ?
(A) NaOH + Al + H2O → 2H2 + NaAlO2
(B) 2NaOH + 2Al + 2H2O → 3H2 + 2NaAlO2
(C) 2NaOH + 2Al + 3H2O → 4H2 + 2NaAlO2
(D) 2NaOH + 2Al + H2O → H2 + 2NaAlO2

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(#M40026883) NDA QUESTION General Ability Test-2012 Keep an EYE

The most important raw material used in the manufacture of cement are
(A) Potassium nitrate, charcoal and sulphur
(B) Limestone, clay and gypsum
(C) Transition metal oxides, sodium hydroxide or potassium hydroxide
(D) Limestone, sodium carbonate and silica

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(#M40026882) NDA QUESTION General Ability Test-2012 Keep an EYE

Consider the following statements :
1. Diamond is hard and graphite is soft.
2. diamond is soft and graphite is hard.
3. Diamond is a bad conductor but graphite is a good conductor.
4. Diamond is a good conductor but graphite is a bad conductor.
Which of the statements given above is/are correct ?
(A) 1 and 3 (B) 1 only
(C) 2 and 3 (D) 1 and 4

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(#M40026881) NDA QUESTION General Ability Test-2012 Keep an EYE

Which one among the following does not have an allotrope ?
(A) oxygen (B) Sulphur
(C) Nitrogen (D) Carbon

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(#M40026880) NDA QUESTION General Ability Test-2012 Keep an EYE

Which one among the following transitions is associated with the largest change in energy in hydrogen atom
(A) n = 5 to n = 3 (B) n = 2 to n = 1
(C) n = 3 to n = 2 (D) n = 4 to n = 2

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(#M40026879) NDA QUESTION General Ability Test-2012 Keep an EYE

An iron ball and a wooden ball of the same radius are released from a height 'H' in vacuum. The time taken to
reach the ground will be -
(A) more for the iron ball (B) more for the wooden ball
(C) equal for both (D) in the ratio of their weights

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(#M40026878) NDA QUESTION General Ability Test-2012 Keep an EYE

The mirror used for the head light at a car is -
(A) spherical concave (B) plane
(C) cylindrical (D) parabolic concave

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