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2011 25 questions

Q512011 · 21 Aug 2011
Directions : The following 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 : Water ( $H_{2} O$ ) is more polar than Hydrogen Sulphide ( $H_{2} S$ ). Statement II : Oxygen is more electronegative than Sulphur.
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.
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Answer: A
Q522011 · 21 Aug 2011
Statement I : Metal ions are Lewis acids. Statement II : Metal ions are electron pair acceptors.
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.
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Answer: A
Q532011 · 21 Aug 2011
Statement I : Diamond is very hard and has high melting point. Statement II : In diamond, each carbon is covalently bonded to four other carbon atoms to form a three-dimensional network.
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.
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Answer: A
Q632011 · 21 Aug 2011
Bases turn red litmus blue and acids turn blue litmus red. A student tested a liquid with a red litmus paper and it stayed red with no change. This shows that the liquid
1. A.must be pure water
2. B.must be an acid
3. C.is not a base
4. D.is neither a base nor an acid
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Answer: C
Q642011 · 21 Aug 2011
The main constituent of vinegar is
1. A.Citric acid
2. B.Acetic acid
3. C.Ascorbic acid
4. D.Tartaric acid
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Answer: B
Q662011 · 21 Aug 2011
All the elements in a group (family) have a common valency. For example, all the elements of the carbon family (carbon, silicon, germanium, tin and lead) have common valency four. However, some of these elements can also have valency two. Which of the following can have valency two?
1. A.Silicon, germanium and tin
2. B.Only germanium and tin
3. C.Germanium, tin and lead
4. D.Only tin and lead
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Answer: C
Q672011 · 21 Aug 2011
Match List I with List II and select the correct answer using the code given below the lists : List I (Metallic oxide) A. Uranium oxide B. Cuprous oxide C. Cobalt oxide D. Chromium oxide List II (Colour imparted to glass) 1. Red 2. Blue 3. Green 4. Yellow Code :
1. A.A-4 B-1 C-2 D-3
2. B.A-3 B-2 C-1 D-4
3. C.A-4 B-2 C-1 D-3
4. D.A-3 B-1 C-2 D-4
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Answer: A
Q762011 · 21 Aug 2011
A neutral (unchanged) metal ball is suspended using a non-magnetic string. A positively charged insulating rod is placed near the ball which is observed to be attracted to the rod. This is because
1. A.the ball becomes positively charged by induction
2. B.the ball becomes negatively charged by induction
3. C.there is a rearrangement of the electrons in the ball
4. D.the number of electrons in the ball is more than the number of electrons on the rod
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Answer: C
Q842011 · 21 Aug 2011
Which one among the following most correctly determines the atomic number of an element?
1. A.Number of protons
2. B.Number of protons and electrons
3. C.Number of ions
4. D.Number of nucleons
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Answer: A
Q892011 · 21 Aug 2011
In oxidation 1. Hydrogen is displaced from a substance. 2. an electropositive element is added to or proportion of electropositive element increases in a substance. Select the correct answer using the code given below:
1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2
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Answer: A
Q902011 · 21 Aug 2011
When a copper rod is dipped in aqueous silver nitrate solution, the colour of the solution changes to blue. This is because
1. A.Cu is more easily reduced than Ag
2. B.Ag is more easily reduced than Cu
3. C.Nitrate ion acts as an oxidizing agent
4. D.Nitrate ion acts as a reducing agent
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Answer: B
Q912011 · 21 Aug 2011
The reaction that takes place in soap making is called saponification. Basically soap is sodium or potassium salts of
1. A.long chain monocarboxylic acids
2. B.glycerol
3. C.long chain dicarboxylic acids
4. D.long chain tricarboxylic acids
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Answer: A
Q922011 · 21 Aug 2011
The number of protons in a negatively charged atom (anion) is
1. A.more than the atomic number of the element
2. B.less than the atomic number of the element
3. C.more than the number of electrons in the atom
4. D.less than the number of electrons in the atom
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Answer: D
Q932011 · 21 Aug 2011
The metal constituent of chlorophyll is
1. A.Iron
2. B.Potassium
3. C.Manganese
4. D.Magnesium
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Answer: D
Q942011 · 21 Aug 2011
During explosion of gunpowder, which of the following gases are evolved in the proportion of 1 : 3?
1. A.Oxygen : Nitrogen
2. B.Nitrogen : Oxygen
3. C.Nitrogen : Carbon dioxide
4. D.Carbon dioxide : Nitrogen
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Answer: C
Q512011 · 17 Apr 2011
Which one among the following statements is not correct?
1. A.In progressive waves, the amplitude may be constant and neighbouring points are out of phase with each other
2. B.In air or other gases, a progressive antinode occurs at a displacement node and a progressive node occurs at a displacement antinode
3. C.Transverse wave can be polarized while longitudinal wave can not be polarized
4. D.Longitudinal wave can be polarized while transverse wave can not be polarized
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Answer: D
Q762011 · 17 Apr 2011
Glass is actually :
1. A.a crystalline solid.
2. B.an ionic solid.
3. C.an elastic solid.
4. D.a vitrified liquid.
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Answer: D
Q782011 · 17 Apr 2011
A student heated some sulphur in a spatula and collected the gas 'X'. Which one among the following is correct about 'X'?
1. A.X is $S O_{2}$ and it turns moist litmus to blue
2. B.X is $S O_{3}$ and it turns moist litmus to red
3. C.X is $S O_{2}$ and it turns moist litmus to red
4. D.X is $S O_{3}$ and it turns dry litmus to blue
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Answer: C
Q792011 · 17 Apr 2011
Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is :
1. A.acetic acid.
2. B.methanoic acid.
3. C.hydrochloric acid.
4. D.citric acid.
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Answer: C
Q812011 · 17 Apr 2011
A bee-sting leaves an acid which causes pain and irritation. The injected acid is :
1. A.acetic acid.
2. B.sulphuric acid.
3. C.citric acid.
4. D.methanoic acid.
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Answer: D
Q842011 · 17 Apr 2011
Silver ware turns black after a period of time due to formation of :
1. A.nitrate coating on silver.
2. B.sulphide coating on silver.
3. C.chloride coating on silver.
4. D.oxide coating on silver.
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Answer: B
Q852011 · 17 Apr 2011
Which of the statements given below is/ are correct? Permanent hardness of water is due to the presence of soluble : 1. chloride of calcium. 2. bicarbonate of calcium. 3. sulphate of magnesium. 4. bicarbonate of magnesium. Select the correct answer using the code given below :
1. A.1 only
2. B.1 and 3 only
3. C.2 and 4
4. D.1, 2 and 3
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Answer: B
Q872011 · 17 Apr 2011
Which one among the following methods is not effective in removing arsenic from contaminated ground water?
1. A.Boiling
2. B.Reverse osmosis
3. C.Ion exchange
4. D.Coagulation-adsorption
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Answer: A
Q882011 · 17 Apr 2011
Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper containing alloys, yet they differ in their chemical composition for additionally containing:
1. A.Zinc in brass and tin in bronze.
2. B.Chromium in brass and nickel in bronze.
3. C.Nickel in brass and tin in bronze.
4. D.Iron in brass and nickel in bronze.
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Answer: A
Q912011 · 17 Apr 2011
Which one among the following statements about stomach is not correct?
1. A.Stomach acts as a temporary reservoir
2. B.Stomach mixes food with gastric juice
3. C.Stomach secretes lipase and amylase in gastric juice
4. D.Rate of stomach emptying depends on the type of food
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Answer: C