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Q 1. Nature of methyl orange is
Acidic
Basic
Neutral
None of these
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Q 2. One of the major environmental concerns is the phenomenon of acid rain. Rain water is an unpolluted atmosphere will be
Neutral
Slightly basic
Slightly acidic
Strongly acidic
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Q 3. In the reaction
{tex}HC_2O_4^- + PO_4^{3-} \rightleftharpoons HPO_4^{2-} + C_2O_4^{2-}{/tex}
Which are the two bronsted bases
{tex}HC_2O_4^- , PO_4^{3-}{/tex}
{tex}HPO_4^{2-}, C_2O_4^{2-}{/tex}
{tex}PO_4^{3-},C_2O_4^{2-}{/tex}
{tex}HC_2O_4^- , HPO_4^{2-}{/tex}
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Q 4. Ammonium ion ({tex}NH_4^+{/tex})is
a conjugate acid
a conjugate base
Neither an acid nor a base
both an acid and a base
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Q 5. The pH of a solution containing 0.1N NaOH solution
1
{tex}10^{-1}{/tex}
13
14
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Q 6. The following acids have been arranged in order to decrease acid strength. Identify the order
ClOH(1), BrOH(2), IOH(3)
1 > 2 > 3
2 > 1 > 3
3 > 2 > 1
1 > 3 > 2
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Q 7. The set with correct order of acidic is
{tex}HClO >HClO_2 >HClO_3 >HClO_4{/tex}
{tex}HClO_4 > HClO_3 >HClO_2 > HClO{/tex}
{tex}HClO > HClO_4 >HClO_3 > HClO_2{/tex}
{tex}HClO_4 > HClO_2 >HClO_3 > HClO{/tex}
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Q 8. {tex}H_2SO_4{/tex} is a
Monoprotic acid
Monobasic acid
Polyprotic acid
Both (A) & (B) are correct
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Q 9. Which of the following is not a lewis acid ?
CO
{tex}SiCl_4{/tex}
{tex}SO_3{/tex}
{tex}Zn^{2+}{/tex}
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Q 10. Which of the following acid is present in sour milk?
glycolic acid
lactic acid
citrus acid
tartaric acid
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Q 11. An acid {tex} ( A ) {/tex} with sodium hydrogen carbonate is used in making the cakes fluffy and spongy. It is due to the release of {tex} ( B ) {/tex} gas in the reaction. Here, {tex} X {/tex} and {tex} Y {/tex} are
{tex} A: {/tex} Oxalic acid : {tex} B: \mathrm { CO } _ { 2 } {/tex}
{tex} A: {/tex} Tartaric acid {tex} : B: \mathrm { O } _ { 2 } {/tex}
{tex} A: {/tex} Succinic acid {tex} : B: \mathrm { H } _ { 2 } {/tex}
{tex} A: {/tex} Tartaric acid : {tex} B: \mathrm { CO } _ { 2 } {/tex}
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Q 12. When {tex} \mathrm { CO } _ { 2 } {/tex} is passed through lime water, it turns milky. the milkiness in due to formation of
{tex} \mathrm { CaCO } _ { 3 } {/tex}
{tex} \mathrm { Ca } ( \mathrm { OH } ) _ { 2 } {/tex}
{tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex}
{tex} \mathrm { CO } _ { 2 } {/tex}
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Q 13. In one of the industrial processes used for manufacture
of sodium hydroxide, a gas {tex}\mathrm X {/tex} is formed as by-product. The gas {tex}\mathrm X {/tex} reacts with lime water to give a compound {tex}\mathrm Y {/tex} which is used as a bleaching agent in chemical industry. The compound {tex}\mathrm X {/tex} and {tex}\mathrm Y {/tex} could be
{tex} \mathrm { H } _ { 2 } {/tex} and {tex} \mathrm { NaHCO } _ { 3 } {/tex} respectively
{tex} \mathrm { CO } _ { 2 } {/tex} and {tex} \mathrm { CaOCl } _ { 2 } {/tex} respectively
{tex} \mathrm { Cl } _ { 2 } {/tex} and {tex} \mathrm { CaOCl } _ { 2 } {/tex} respectively
{tex} \mathrm { Cl } _ { 2 } {/tex} and {tex} \mathrm { NaHCO } _ { 3 } {/tex} respectively
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Q 14. Plaster of pairs is made from-
lime stone
slaked lime
quick lime
gypsum
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Q 15. On prolong supply of {tex} \mathrm { CO } _ { 2 } ( \mathrm { g } ) {/tex} in lime solution (lime- water), it is observed that
lime solution changes to gaseous state
the milkiness of lime water disappears
the milkiness of lime water changes from white to red.
the colour of lime water becomes black
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Q 16. When {tex} \mathrm { Ca } ( \mathrm { OH } ) _ { 2 } {/tex} reacts with {tex} \mathrm { CO } _ { 2 } ( \mathrm { g } ) , {/tex} it will give {tex} \mathrm { CaCO } _ { 3 } ( \mathrm { s } ) {/tex} and {tex} \mathrm { H } _ { 2 } \mathrm { O } ( l ) . {/tex} The nature of {tex} \mathrm { CaCO } _ { 3 } {/tex} is
acidic
basic
neutral
All are possible
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Q 17. The correct statement regarding universal indicator is
it is an indicator having {tex} \mathrm { pH } = 7 {/tex}
it gives blue colour at {tex} \mathrm { pH } = 3 {/tex}
it becomes colourless at {tex} \mathrm { pH } = 7 {/tex}
it gives orange colour at {tex} \mathrm { pH } = 3 {/tex}
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Q 18. A blue litmus paper was first dipped in dil. {tex}\mathrm{HCl}{/tex} and then in dil. {tex}\mathrm{NaOH}{/tex} solution. It was observed that the colour of the litmus paper-
changed to red
changed first to red and then to blue
changed blue to colourless
remains blue in both the solutions
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Q 19. Bleaching powder is soluble in cold water giving a milky solution due to-
available chlorine
lime present in it
calcium carbonate formation
The absorption of carbon dioxide from atmosphere
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Q 20. Reaction of an acid with a base is known as-
decomposition
combination
redox reaction
neutralization
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Q 21. Which of the following acid does not react with metals-
sulphuric acid
phosphoric acid
carbonic acid
nitric acid
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Q 22. Bleaching powder gives smell of chlorine because it-
is unstable
gives chlorine on exposure to atmosphere
is a mixture of chlorine and slaked lime
contains excess of chlorine
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Q 23. Plaster of Paris hardens by-
giving of {tex} \mathrm { CO } _ { 2 } {/tex}
changing into {tex} \mathrm { CaCO } _ { 3 } {/tex}
combining with water
giving out water
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Q 24. Aqueous solution of copper sulphate reacts with aqueous ammonium hydroxide solution to give.
brown precipitate
pale blue precipitate
white precipitate
green precipitate
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Q 25. The {tex} \mathrm { pH } {/tex} of a solution is {tex} 5.0 . {/tex} Its hydrogen ion concentration is decreased by {tex}100{/tex} times, the solution will be:
more acidic
basic
neutral
unaffected
