Chemistry · NDA previous year questions

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2016 33 questions

Q542016 · 18 Sept 2016
The property of electric current which is applicable in the fuse wire is
1. A.chemical effect of current
2. B.magnetic effect of current
3. C.heating effect of current
4. D.optical property of current
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Answer: C
Q592016 · 18 Sept 2016
If we plot a graph between volume $V$ and inverse of pressure $P$ (i.e., $\frac{1}{P}$ ) for an ideal gas at constant temperature $T$ , the curve so obtained is
1. A.straight line
2. B.circle
3. C.parabola
4. D.hyperbola
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Answer: A
Q722016 · 18 Sept 2016
Which one of the following statements is not correct ?
1. A.The SI unit of charge is ampere-second
2. B.Debye is the unit of dipole moment
3. C.Resistivity of a wire of length $l$ and area of cross-section $a$ depends upon both $l$ and $a$
4. D.The kinetic energy of an electron of mass $m$ kg and charge $e$ coulomb, when accelerated through a potential difference of $V$ volt, is $e V$ joule
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Answer: C
Q742016 · 18 Sept 2016
Which of the following items is used in the household wirings to prevent accidental fire in case of short circuit?
1. A.Insulated wire
2. B.Plastic switches
3. C.Non-metallic coatings on conducting wires
4. D.Electric fuse
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Answer: D
Q752016 · 18 Sept 2016
Match List I with List II and select the correct answer using the code given below the Lists: $List I (Element) A. Sulfur B. Phosphorous C. Lead D. Silver List II (Highest Valency) 1. Five 2. Six 3. Two 4. Four$ Code : $A B C D$
1. A.2 4 1 3
2. B.2 1 4 3
3. C.3 1 4 2
4. D.3 4 1 2
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Answer: B
Q762016 · 18 Sept 2016
Identify the element having zero valency
1. A.Sulphur
2. B.Phosphorous
3. C.Lead
4. D.Radon
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Answer: D
Q772016 · 18 Sept 2016
There are six electrons, six protons and six neutrons in an atom of an element. What is the atomic number of the element?
1. A.6
2. B.12
3. C.18
4. D.24
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Answer: A
Q782016 · 18 Sept 2016
Which one of the following has different number of molecules? (All are kept at normal temperature and pressure)
1. A.3 gram of Hydrogen
2. B.48 gram of Oxygen
3. C.42 gram of Nitrogen
4. D.2 gram of Carbon
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Answer: D
Q792016 · 18 Sept 2016
Which one of the following statements is correct?
1. A.Covalent bonds are directional
2. B.Ionic bonds are directional
3. C.Both covalent and ionic bonds are directional
4. D.Both covalent and ionic bonds are non-directional
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Answer: A
Q812016 · 18 Sept 2016
The LPG cooking gas contains propane and butane as the constituents. A sulfur containing compound is added to the LPG, because
1. A.it lowers the cost of production
2. B.it enhances the efficiency of LPG
3. C.it facilitates easy detection of leakage of the gas
4. D.it assists in liquefying hydrocarbons
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Answer: C
Q842016 · 18 Sept 2016
The setting time of cement is lowered by adding
1. A.oxides of aluminium
2. B.gypsum
3. C.oxides of magnesium
4. D.silica
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Answer: A
Q872016 · 18 Sept 2016
Which one of the following gases gives acidic solution on dissolving in water ?
1. A.Hydrogen
2. B.Carbondioxide
3. C.Nitrogen
4. D.Oxygen
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Answer: B
Q882016 · 18 Sept 2016
How many moles of hydrogen atom are present in one mole of Aluminium hydroxide ?
1. A.One mole
2. B.Two moles
3. C.Three moles
4. D.Four moles
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Answer: C
Q892016 · 18 Sept 2016
Which one of the following species is not capable of showing disproportionation reaction?
1. A. $Cl O^{-}$
2. B. $Cl O_{2}^{-}$
3. C. $Cl O_{3}^{-}$
4. D. $Cl O_{4}^{-}$
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Answer: D
Q992016 · 18 Sept 2016
Match List I with List II and select the correct answer using the code given below the Lists : $List I (Process) A. Heating Camphor B. Cooling of water vapour up to room temperature C. Cooking an egg D. Formation of water vapour at room temperature List II (Type of change) 1. Chemical 2. Evaporation 3. Condensation 4. Sublimation$ Code :
1. A.A-4 B-3 C-1 D-2
2. B.A-4 B-1 C-3 D-2
3. C.A-2 B-1 C-3 D-4
4. D.A-2 B-3 C-1 D-4
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Answer: A
Q672016 · 17 Apr 2016
Which one of the following statements with regard to expansion of materials due to heating is not correct?
1. A.As ice melts, it expands uniformly up to 4°C.
2. B.Mercury thermometer works using the principle of expansion due to heating.
3. C.Small gap is kept between two rails to allow for expansion due to heating.
4. D.The length of metallic wire increases when its temperature is increased.
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Answer: A
Q682016 · 17 Apr 2016
Which one of the following is not a form of stored energy?
1. A.Nuclear energy
2. B.Potential energy
3. C.Electrical energy
4. D.Chemical energy
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Answer: C
Q702016 · 17 Apr 2016
Which one of the following oxides dissolves in water ?
1. A. $CuO$
2. B. $A l_{2} O_{3}$
3. C. $F e_{2} O_{3}$
4. D. $N a_{2} O$
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Answer: D
Q712016 · 17 Apr 2016
Matter around us can exist in three different states, namely, solid, liquid and gas. The correct order of their compressibility is
1. A.Liquid < Gas < Solid
2. B.Solid < Liquid < Gas
3. C.Gas < Liquid < Solid
4. D.Solid < Gas < Liquid
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Answer: B
Q722016 · 17 Apr 2016
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of
1. A.strength of the intermolecular forces of attraction
2. B.strength of the intermolecular forces of repulsion
3. C.molecular mass
4. D.molecular size
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Answer: A
Q732016 · 17 Apr 2016
Which one of the following elements will not react with dilute $HCl$ to produce $H_{2}$ ?
1. A. $Hg$
2. B. $Al$
3. C. $Mg$
4. D. $Fe$
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Answer: A
Q742016 · 17 Apr 2016
When a solid is heated, it turns directly into a gas. This process is called
1. A.Condensation
2. B.Evaporation
3. C.Sublimation
4. D.Diffusion
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Answer: C
Q752016 · 17 Apr 2016
Which one of the following is water gas ?
1. A.Mixture of carbon monoxide and hydrogen
2. B.Mixture of carbon monoxide and nitrogen
3. C.Mixture of carbon dioxide and water vapour
4. D.Mixture of carbon monoxide and water vapour
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Answer: A
Q772016 · 17 Apr 2016
Suppose you have four test tubes labelled as ‘A’, ‘B’, ‘C’ and ‘D’. ‘A’ contains plain water, ‘B’ contains solution of an alkali, ‘C’ contains solution of an acid, and ‘D’ contains solution of sodium chloride. Which one of these solutions will turn phenolphthalein solution pink ?
1. A.Solution ‘A’
2. B.Solution ‘B’
3. C.Solution ‘C’
4. D.Solution ‘D’
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Answer: B
Q782016 · 17 Apr 2016
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
1. A.12
2. B.6
3. C.10
4. D.14
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Answer: B