Chemistry Mock Test 9

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Q-1. The correct order of dipole moments of HF, and is.

(a)

(b)

(c)

(d)

Q-2. Heat exchanged in a chemical reaction at the constant temperature and pressure is known as

(a) Internal energy

(b) Entropy

(c) Enthalpy

(d) Free energy

Q-3. The alkane is not obtained from

(a) Hydroxylation of ethane

(b)

(c)

(d) Sodium propionate solution electrolysis

Q-4. According to Bronsted, a base is a substance which

(a) Accept proton

(b) Donate electron

(c) Lose a pair of electron

(d) Gain a pair of electron

Q-5. A mixture of sodium benzoate and sodium on heating produce

(a)

(b)

(c)

(d) none of these

Q-6. The de-Broglie wavelength of a particle with mass 1 gm and velocity 100 m/s is

(a)

(b)

(c)

(d)

Q-7. Baeyer’s reagent is used

(a) in Benedict solution

(b) for oxidation

(c) for reduction

(d) for reduction

Q-8. The number of electrons in

(a) 18

(b) 19

(c) 20

(d) 21

Q-9. The molecular weight of a compound is 180. if its empirical formula is then the molecular formula of compound is

(a)

(b)

(c)

(d)

Q-10. The weight of lime obtained by heating 200 kg of 95% pure lime stone is

(a) 98.4 kg

(b) 106.4 kg

(c) 112.8 kg

(d) 122.6 kg

Q-11. In a reaction , if the concentration of A and B is doubled. then the equilibrium constant is

(a) remains same

(b) halved

(c) double

(d) increased four times

Q-12. The oxidation state of chromium in potassium dichromate is

(a) +4

(b) -4

(c) +6

(d) -6

Q-13. The percentage of carbon in anthracite is

(a) 60%

(b) 70%

(c) 80%

(d) 90%

Q-14. The reactivity of metals with water is in the order of

(a)

(b)

(c)

(d)

Q-15. Magnesium contain

(a)

(b)

(c)

(d)

Q-16. Graphite is a good conductor of heat and electricity because it contains

(a) Layer of carbon atoms

(b) Sheet like structure

(c) Free electrons

(d) no free electrons

Q-17. The boiling point of three saturated hydro carbons A, B and C are respectively. The hydrocarbon having the maximum number of carbon atoms in its molecule is

(a) A

(b) B

(c) C

(d) none of these

Q-18. The volume of a gas measured at and 1atm pressure is 10 liters. To reduce the volume to 5 liters at 1 atm pressure, the temperature required is

(a) 75 K

(b) 150 K

(c) 225 K

(d) 300 K

Q-19. The coordinate bond is found in

(a)

(b)

(c)

(d) All the above

Q-20. Which of the following isomerism is exhibited by?

(a) Optical isomerism

(b) Chain isomerism

(c) Metamerism

(d) Position isomerism

Q-21. Chlorine oxidase ethyl alcohol to

(a)

(b)

(c)

(d)

Q-22. Tyndall effect can be observed in

(a) Colloidal solution

(b) Solvent

(c) Solute

(d) Precipitate

Q-23. in the above reaction the product X is

(a)

(b)

(c)

(d)

Q-24. Mg does not decompose

(a) Cold water

(b) Hot water

(c) Steam

(d) Boiled water

Q-25. Reacts with to produce

(a)

(b)

(c)

(d)

Q-26. Which indicator is used to titrate solution with HCl ?

(a) Methyl orange

(b) Phenolphthalein

(c) dil.

(d) None of the above

Q-27. The amount of dibasic acid present in 100 ml of the aq. solution to give strength is [mol. wt=2000, normality=0.1]

(a) 0.5 gm

(b) 1 gm

(c) 1.5 gm

(d) 2 gm

Q-30. Calcium format on dry heating produce

(a)

(b)

(c)

(d)

Q-31. Chromyl chloride oxidise toluene to Benz aldehyde this reaction is known as

(a) Rosennmund reaction

(b) Wurtz reaction

(c) Etard reaction

(d) Fitting reaction

Q-32. Which of the following have least value?

(a)

(b)

(c)

(d)

Q-33. The shape of molecule is

(a) linear

(b) tetrahedral

(c) planar

(d) pyramidal

Q-34. The gas evolved by heating potassium ferrocyanide crystals with conc. is

(a)

(b)

(c)

(d)

Q-35. For an ideal gas joule Thomson coefficient is

(a) Zero

(b) Negative

(c) Positive

(d) Depend on molecular weight

Q-36. By which reaction a ketone can be converted into a hydrocarbon?

(a) Aldol condensation

(b) Reimer-Tiemann reaction

(c) Cannizzaro reaction

(d) Wolf-Kishner reaction

Q-37. The photo-chemical laws are applicable to

(a) Primary reaction

(b) Secondary reaction

(c) Both of these

(d) None of these

Q-38. A compound having molecular mass = 78 contains C =92.31% an H=7.69%. its molecular formula is

(a)

(b)

(c)

(d)

Q-39. Half-life of radium is 1580 years. Its average life will be

(a)

(b)

(c)

(d)

Q-40. In lake test of ion, there is formation of colored floating lake. It is due to

(a) Adsorption of litmus by

(b) Adsorption of litmus by

(c) Adsorption of litmus by

(d) None of these