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Q 1. The pH of the solution of 5 x {tex}10^{-8}{/tex} M HCl at 25{tex} ^0{/tex}C is -
6.3
6.9
7.3
7.9
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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. What is pH of an acidic solution
Greather than 7
Equal to 7
Less than 7
Greater than 10
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Q 7. 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 8. 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 9. {tex}H_2SO_4{/tex} is a
Monoprotic acid
Monobasic acid
Polyprotic acid
Both (A) & (B) are correct
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Q 10. pH of solution is zero. The nature of this solution is
acidic
basic
Neutral
amphoteric
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Q 11. Oxygen exhibits (-1) oxidation state
{tex}OF_2{/tex}
{tex}H_2O{/tex}
{tex}H_2O_2{/tex}
HClO
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Q 12. Nature of methyl orange is
Acidic
Basic
Neutral
None of these
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Q 13. When the pH of the environment of protein is changed it is said to be denatured. This is due to
Breakage of peptide bond
Breakage of disulfide links
Loss of tertiary structure
break down of regroups
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Q 14. What is aqua regia ?
1 : 2 mixture of chromic acid and sulphuric acid
1 : 3 Mixtureof conc. HCl and conc. {tex}HNO_3{/tex}
1 : 3 mixture of conc. {tex}HNO_3{/tex} and conc. HCl
1 : 1 mixture of conc. {tex}H_2SO_4 {/tex} and conc. HCl
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Q 15. Which gas is evolved when metal carbonates and bicarbonates react with acids ?
{tex}O_2{/tex}
{tex}CO_2{/tex}
{tex}H_2{/tex}
{tex}N_2{/tex}
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Q 16. {tex}H_3BO_3 {/tex} is
monobasic and weak lewis acid
monobasic and weak bronsted acid
monobasic acid and strong lewis acid
Tribasic and weak bronsted acid
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Q 17. In {tex}I_3^-{/tex} lewis base is
{tex}I_2{/tex}
{tex}I_2^+{/tex}
{tex}I_2^-{/tex}
{tex}I^-{/tex}
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Q 18. 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 19. The acid produced in our stomach is
Sulphuric acid
Hydrochloric acid
Acetic acid
Oxalic acid
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Q 20. The salt whose aqueous solution turns phenophthalein indicator pink is ?
KCl
{tex}K_2SO_4{/tex}
{tex}K_2CO_3{/tex}
{tex}KNO_3{/tex}
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Q 21. {tex}Ca(OH)_2 (s) + Cl_2 (g) \rightarrow ?{/tex}
{tex}Ca(OH)_2 + H_2O{/tex}
Slaked lime
{tex}CaOCl_2 + H_2O{/tex}
Gypsum
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Q 22. A Colorless gas B is produced when eggshell is treated with a solution. The gas B turns lime water milky. What are A and B?
A = NaCl & B = {tex}CO_2{/tex}
A = HCl & B = {tex}CO_2{/tex}
A = NaCl & B = {tex}Cl_2{/tex}
A = {tex}H_2SO_4{/tex} & B = {tex}O_2{/tex}
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Q 23. What is the chemical composition of plaster of pairs
{tex}CaSO_4.2H_2O{/tex}
{tex}CaSO_4.H_2O{/tex}
{tex}CaSO_4 \frac{1}{2} H_2O{/tex}
{tex}CaSO_4.3H_2O{/tex}
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Q 24. An element X reacts with dil {tex}H_2SO_4{/tex} as well as with NaOH to produce salt and {tex}H_2{/tex}(g) Hence it may be concluded that
(I) X is an electropositive element
(II) Oxide of X is basic in nature
(III) Oxide of X is acidic in nature
(IV) X is an electronegative element
I,II,III
IV,I,II
III,IV,I
I & II only
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Q 25. Which of the following is not the raw material for the manufacturing of baking soda?
Common salt
Ammonia
Lime stone
Slaked lime