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2013 32 questions

Q532013 · 11 Aug 2013
Directions
Directions: The following 07 (Seven) items consist of two statements, statement I and statement II. You are to examine these two statements carefully and select the answers to these items using the code given below: Statement I: Glass is not considered as a true compound.
Statement I: Very little hydrogen is produced when sulphuric acid is added to calcium. Statement II: The salt that is produced, calcium sulphate, is insoluble.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the Statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q542013 · 11 Aug 2013
Directions
Directions: The following 07 (Seven) items consist of two statements, statement I and statement II. You are to examine these two statements carefully and select the answers to these items using the code given below: Statement I: Glass is not considered as a true compound.
Statement I: Zinc is used for galvanization to protect iron from rusting. Statement II: Zinc is more reactive towards oxygen than iron.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the Statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q562013 · 11 Aug 2013
Which one, among the following atmospheric gases, filters out most of the ultraviolet radiation of the Sun?
1. A.Oxygen
2. B.Nitrogen
3. C.Helium
4. D.Ozone
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Answer: D
Q612013 · 11 Aug 2013
Which one among the following substances is never excreted out through urine under normal circumstances in any healthy individual?
1. A.Urea
2. B.Sodium
3. C.Amino acid
4. D.Potassium
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Answer: C
Q722013 · 11 Aug 2013
The figure given above shows the temperature (T) – time (t) plot when we start heating a piece of naphthalene. The temperature (T*) at the plateau of the curve signifies
1. A.boiling point of naphthalene.
2. B.freezing point of naphthalene.
3. C.melting point of naphthalene.
4. D.the temperature when naphthalene undergoes a chemical change upon heating.
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Answer: C
Q772013 · 11 Aug 2013
The plot given above represents displacement 'x' of a particle with time 't'. The particle is
1. A.moving with uniform velocity.
2. B.moving with acceleration.
3. C.moving with deceleration.
4. D.executing a periodic motion.
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Answer: B
Q842013 · 11 Aug 2013
Bats can know about their prey at a distance even in the night by emitting
1. A.infra-red lights.
2. B.ultraviolet lights.
3. C.chemicals from their body.
4. D.ultrasonic sounds.
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Answer: D
Q912013 · 11 Aug 2013
Pressure of a gas increases due to increase of its temperature because at higher temperature
1. A.gas molecules repel each other more.
2. B.potential energy of the gas molecules is higher.
3. C.kinetic energies of the gas molecules are higher.
4. D.gas molecules attract each other more.
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Answer: C
Q932013 · 11 Aug 2013
Calcium ammonium nitrate (CAN) is a popular nitrogen fertilizer because it is
1. A.slow supplier of nitrogen.
2. B.having more percentage of nitrogen in it.
3. C.fixing the nitrogen in the soil.
4. D.capable of making the soil acidic.
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Answer: B
Q942013 · 11 Aug 2013
Chromium oxide is used as an ingredient in paints to obtain
1. A.green colour
2. B.blue colour
3. C.red colour
4. D.violet colour
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Answer: A
Q962013 · 11 Aug 2013
The pH of the solution obtained by dissolving pure sodium chloride in water is
1. A.acidic
2. B.basic
3. C.neutral
4. D.dependent on the amount of sodium chloride dissolved in water
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Answer: C
Q972013 · 11 Aug 2013
Oxygen on reaction with non-metals forms oxides, which are
1. A.basic oxides
2. B.acidic oxides
3. C.amphoteric oxides
4. D.neutral oxides
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Answer: B
Q982013 · 11 Aug 2013
Biogas consists of mainly
1. A.Methane
2. B.Ethane
3. C.Butane
4. D.Carbon dioxide
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Answer: A
Q992013 · 11 Aug 2013
A gas is evolved when a piece of zinc metal is placed in dilute sulphuric acid ( $H_{2} S O_{4}$ ). Which is the gas ?
1. A.Hydrogen
2. B.Oxygen
3. C.Water vapour
4. D.Sulphur dioxide
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Answer: A
Q1012013 · 11 Aug 2013
Metalloids are
1. A.alloys of alkali metals with other metals.
2. B.colloids of metals.
3. C.elements having some properties of both metals and non-metals.
4. D.metals heavier than lead.
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Answer: C
Q1022013 · 11 Aug 2013
Two reactants in a flask produce bubbles of gas; it turns lime water into milky. The reactants in the flask are
1. A.Zinc and hydrochloric acid
2. B.Magnesium carbonate and hydrochloric acid
3. C.Magnesium nitrate and hydrochloric acid
4. D.Magnesium sulphate and hydrochloric acid
Show answer
Answer: B
Q512013 · 14 Apr 2013
Directions : The following eight (8) items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below : Code : (a) Both the statements are individually true and Statement II is the correct explanation of Statement I (b) Both the statements are individually true but Statement II is not the correct explanation of Statement I (c) Statement I is true but Statement II is false (d) Statement I is false but Statement II is true Statement I : Hard water does not give lather with soap. Statement II : Calcium and magnesium salts present in hard water form precipitate with soap.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q562013 · 14 Apr 2013
Which one among the following is the chemical formula of gypsum which is an ingredient of cement?
1. A. $C a_{2} Si O_{4}$
2. B. $CaS O_{4} \cdot 2 H_{2} O$
3. C. $CaO$
4. D. $CaS O_{4} \cdot 3 H_{2} O$
Show answer
Answer: B
Q582013 · 14 Apr 2013
The bond which is present between water molecules is
1. A.electrovalent bond
2. B.covalent bond
3. C.hydrogen bond
4. D.van der Waals bond
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Answer: C
Q602013 · 14 Apr 2013
Which of the following statements regarding the property of hard water is/are correct? 1. Temporary hardness of water is due to the presence of soluble magnesium and calcium hydrogen carbonate. 2. Temporary hardness of water can be removed by boiling. 3. Calgon’s method is applied to remove temporary hardness of water. 4. Permanent hardness of water is removed by Clark’s method. Select the correct answer using the code given below.
1. A.1 and 2 only
2. B.1, 2 and 3
3. C.3 and 4
4. D.2 only
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Answer: A
Q722013 · 14 Apr 2013
Two atoms are said to be isotopes if
1. A.they have the same atomic number but different mass numbers
2. B.they have the same number of neutrons but different mass numbers
3. C.the sum of the number of protons and neutrons is the same, but the number of protons is different
4. D.they have the same number of neutrons but different modes of radioactive decay
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Answer: A
Q752013 · 14 Apr 2013
Sodium stearate is a salt and is used
1. A.in gunpowder
2. B.in paint
3. C.to make soap
4. D.to make fertilizer
Show answer
Answer: C
Q762013 · 14 Apr 2013
The pure form of carbon is
1. A.diamond
2. B.graphite
3. C.charcoal
4. D.fullerene
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Answer: D
Q772013 · 14 Apr 2013
The pH of fresh milk is 6. When it turns sour, the pH
1. A.becomes $< 6$
2. B.remains the same, i.e., 6
3. C.becomes $> 6$
4. D.becomes neutral, i.e., 7
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Answer: A
Q782013 · 14 Apr 2013
The displacement of a particle is given by $x = cos^{2} ω t$ . The motion is
1. A.simple harmonic
2. B.periodic but not simple harmonic
3. C.non-periodic
4. D.None of the above
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Answer: A