Practice Test

1) A standard solution is one

2) Normality, molarity, equivalent mass and molecular mass are related to each other as

3) Which is correct about primary standard?

4) Equivalent mass of Mohr's salt reacts with

5) One mole of Mohr 's salt reacts with

6) In the titration of sodium carbonate with hydrochloric acid taken in burette the indicator used is/are

7) The essential condition for an indicator to be used in a titration is

8) In the titration of weak acid with strong base, at end point

9) Metals like silver and copper can be obtained in colloidal state by

10) In which of the following acid-base titration, pH is greater than 8 at the equivalence point?

11) The indicator used in titrating oxalic acid with caustic soda solution is

12) The change in pH near the end point will be maximum in the titration of

13) Why are strong acids generally used as standard solution in acid-base titration?

14) Choose the correct statement

15) Process of dissolution of a salt is exothermic if

16) During the determination of heat of solution of copper sulphate, salt is taken in powdered form because

17) Heat of neutralization of a strong acid and strong base is nearly equal to

18) The stability of dispersed phase in a lyophobic colloid is due to

19) Heat of neutralization of a strong acid by a strong base is a constant value because

20) Which of the following statement is not correct in respect of hydrophilic sols?

21) Bredig's arc method can not be used to prepare colloidal solution of which of the following?

22) The enthalpy of neutralization of acetic acid and sodium hydroxide is -55.4 kJ what is the heat of formation of water, than heat evolved on neutralization is

23) Equal volume of methanoic acid and sodium hydroxide are mixed. If x is the heat of formation of water, then heat evolved on neutralization is

24) Lyophilic colloids are stable due to

25) Which of the following is a lyophilic colloid?

26) Under a given set of experimental conditions, with increase of concentration of reactants, the rate of a chemical reaction

27) Which of the following does not affect the rate of reaction?

28) Rate of reaction

29) Which of the following can form colloidal solution with water?

30) In colloidal state, particle size ranges from

31) Which of the following constitutes irreversible colloidal system in water as dispersion medium?

32) Which one among the following sols is hydrophobic?

33) Which of the following substance is not used for preparing lyophilic sol?

34) The rate of reaction increase with increase of temperature because

35) pH indicators are

36) Heat of neutralization is least when

37) Heat of neutralization of aqueous hydrochloric acid by N a O H is x kcal/mole of H C l. Calculate the heat of neutralization per mole of aqueous acetic acid.

38) Which of the following does not turn blue litmus red?

39) Carbylamine test is used to

40) Lucas reagent is used to

41) Aldehydes and ketones can be distinguished from each other by

42) Presence of phenolic group can be confirmed by

43) Which of the following test is not given by phenols?

44) Sodium nitroprusside test is used to distinguish between

45) Which of the following tests can not be used to distinguish between aldehydes and ketones?

46) When a pinch of sodium bicarbonate is added to carboxylic acid brisk effervescence is produced. This effervescence is produced due to evolution of

47) Small amount of zinc dust is added to reaction mixture during preparation of acetanilide because

48) Anilides are generally

49) Diazo coupling is useful to prepare

50) Nitration of aniline is achieved by

51) Reaction of aniline with acetyl chloride in the presence of NaOH gives

52) Acetanilide finds application in medicine as

53) When aniline is heated with acetic anhydride and acylation because

54) Nitration of aniline is carried out after acylation because

55) During coupling reaction of benzenediazonium chloride and aniline the pH of the reaction medium should be

56) Mohr's salt is a

57) Mohr's salt is a

58) Mohr's salt is a

59) During preparation of Mohr's salt equimolar mixture of ..........................is dissolved in water. Which one of the following should be filled in blank?

60) Sometimes on cooling the saturated solution, crystallisation does not occur. In that case a crystal of same substance is placed in the saturated solution which includes crystallisation. The process is known as

61) Total number of ions produced when potash alum is dissolved in water is

62) Lead has been placed in group 1st and 2nd because

63) In third group, iron gives blood red coloration with ammonium thiocyanate due to the formation of the compound

64) Nitrate is confirmed by ring test. The brown color of the ring is due to the formation of

65) Which does not give borax bead test?

66) A blue colouration is not obtained when

67) On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolved inexcess alkali. The salt solution contains

68) A salt on treatment with dilute HCl gives a pungent smelling gas and a yellow precipitate. The salt gives green flame when tested. The solution gives a yellow precipitate with potassium chromate. The salt is

69) Which of the following statement is correct?

70) When a substance A reacts with water it produces a combustible gas B and a solution substance C in water.When another substance D reacts with this solution of C, it also produce the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow color to a smokeless flame of bunsen burner. A, B, C and D respectively are

71) A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of colourless gas Y. Identify X and Y.

72) A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI is converted into orange colour solution. The cation of the metal nitrate is