100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS

1.	At what temperature range most of the metals becomes superconductors
Answer» Correct Answer - `2 K - 5K`

Discussion

2.	Which point defect lowers the density of a crystal?
Answer» Correct Answer - Schottky defect.

Discussion

3.	Stomach acid is a solution of HCl with concentration of 2.2 × 10–3 M. what is the pH of stomach acid : (A) 3.92 (B) 2.65 (C) 4.92 (D) 1.92
Answer» Correct option: (B) 2.65 Explanation: HCl is 100 % ionised so [H₃O⁺] = 2.2 × 10^–3 M pH = – log (2.2 × 10^–3 M) or pH = 2.65

3.

Stomach acid is a solution of HCl with concentration of 2.2 × 10–3 M. what is the pH of stomach acid : (A) 3.92 (B) 2.65 (C) 4.92 (D) 1.92

Answer»

Correct option: (B) 2.65

Explanation:

HCl is 100 % ionised so

[H₃O⁺] = 2.2 × 10^–3 M

pH = – log (2.2 × 10^–3 M) or pH = 2.65

Discussion

4.	10^-8 M HCl विलयन का Ph होगाA. 7B. 6.98C. 6D. 8
Answer» Correct Answer - B

Discussion

5.	0.1 M HCN विलयन का Ka 1x10^-7 है इस विलयन का Ph होगाA. 4B. 5C. 2D. 1
Answer» Correct Answer - A

Discussion

6.	Magnetic separation process may be used fro the concentration of :A. chalcopyriteB. bauxiteC. haematiteD. calamine
Answer» Correct Answer - C It is used to separate haematite ore as it is attracted by electromagent.

Discussion

7.	Main funcation of roasting isA. To remove volatile sunstancesB. OxidationC. ReductionD. Slag formation
Answer» Correct Answer - A To remove volatile sunstances. `S_(8)+8O_(2)rarr8 SO_(2)uarr, P_(4) +5O_(2) rarr P_(8) O_(10)uarr` `4As +3O_(2)rarr 2As_(2)O_(3)uarr`

Discussion

8.	Which of the following is not an ore of magnesium?A. MagnesiteB. DolomiteC. GypsumD. Carnallite
Answer» Correct Answer - C Gypsum `(CaSO_(4).2H_(2)O)` is an ore of calcium. Dolomite `(CaCO_(3).MgCO_(3))`, Magnesite `(MgCO_(3))` and Carnallite `(KC1.MgC1_(2).6H_(2)O)` are the ores of Magnesium.

Discussion

9.	Which of the following matels cannot be extracted by carbon reducation process?A. `Pb`B. `A1`C. `Hg`D. `Zn`
Answer» Correct Answer - B According to Ellingham diagram, `A1` cannot be extracted by carbon reduction meted

Discussion

10.	(iii) Which is not a basic flux ?A. `CaCO_(3)`B. LimeC. `SiO_(2)`D. `CaO`
Answer» Correct Answer - C `underset("Acidic flux")(SiO_(2))CaC underset("Basic flux")(O_(3),lime,)CaO li m e CaO`

Discussion

11.	(h) In froth process, the ore particles float because their surface is ____.A. they are light.B. they are insolubleC. they are chargedD. they are hydrophobic
Answer» Correct Answer - D Potessium or sodium ethly xanthate get attached with the particle of the sulphide ore and thus make them water repellant i.e. hydrophobic.

Discussion

12.	(h) In froth process, the ore particles float because their surface is ____.A. they are light.B. they are insolubleC. their surface is perferentially wetted by oil.D. they bear an electrostatic charge.
Answer» Correct Answer - C This method is commonly used for the concentration of the low grabe sulphide ores like galena, `PbS(ore of pb)`, copper pyrites `CuFeS_(2)` (pre of copper), zince blende, `ZnS` (ore of zinc) etc, and is based on the fact that gangue and ore particles have different degree of wettebility with water and pine oil, the gangue particles are perferentially wetted by water while the ore particles are wetted by oil.

Discussion

13.	(g) An ore of tin containing `FeCrO_(4)` is concentrated by ____.
Answer» Correct Answer - Magnetic separation Magnetic separation

Discussion

14.	(h) In froth process, the ore particles float because their surface is ____.
Answer» Correct Answer - Hydrophobic Hydrophobic

Discussion

15.	In electrorefining, the impure metal is made _____.
Answer» Correct Answer - Anode Anode

Discussion

16.	Coating of zinc on iron objects is commonly known as _____.
Answer» Correct Answer - Galvanisation Galvanisation

Discussion

17.	The conductivity of a saturated solution of `BaSO_4` is ` 3. 06 xx 10^(-6) "ohm"^(-1) cm^(-1)` and its equivalent conductance is `1.53 "ohm"^(-1) cm^2 equiv^(-1)`. The `K_(sp)` for `BaSO_4` will be .A. `4 xx 10^-6`B. `2.5 xx 10^-9`C. `2.5 xx 10^-13`D. `4 xx 10^-12`
Answer» Correct Answer - A `lamda_m = (1000 K)/(S) = (1000 xx 3.06 xx 10^-6)/(S) = 1.53` `S = 2 xx 10^-3 (mol)/(litre)` `K_(sp)(BaSO_4)` = `S^2 = (2 xx 10^-3)^2 = 4 xx 10^-6`.

Discussion

18.	10 g of hydrogen and 64 g of oxygen were filled in a steed vessel and exploded. Amount of water produced in this reaction will be :-A. 2 moleB. 3 moleC. 4 moleD. 1 mole
Answer» Correct Answer - A

Discussion

19.	A compound is analyzed and found to consist of 50.4% Ce,15.1% N and 34.5% O by mass. What is the correct formula for the compound ? (Atomic wt. of Ce = 140)A. `Ce_(2)(NO_(3))_(2)`B. `Ce_(2)(NO_(2))_(3)`C. `Ce(NO_(3))_(2)`D. `Ce(NO_(2))_(3)`
Answer» Correct Answer - D `{:(Ce,N,O,,),((50.4)/(140),(15.1)/(14),(34.5)/(16),,"formula" Ce(NO_(2))_(3)),(0.36,1.07,2.15,,),(1" ":,3" ":,6,,):}`

Discussion

20.	`100 mL` of a sample of hard water requires `25.1 mL` of `0.02 N H_(2)SO_(4)` for complete reaction, The hardness of water ( density `1g//mL)` is:A. 200 ppmB. 250 ppmC. 251 ppmD. 258 ppm
Answer» Correct Answer - C milliequivalent of `H_(2)SO_(4)=25.1xx0.02=0.502` Equivalent `=0.502xx10^(-3)` Eq of `H_(2)SO_(4)=`Eq of `CaCO_(3)` `therefore` Mass of `CaCO_(3)=Eqxx50=0.502xx10^(-3)xx50=0.0251` 100 mL of `H_(2)O=100g` contains 0.0251 g `CaCO_(3)` `10^(6)g` of water will contain `(0.0251)/(10^(2))xx10^(6)=251g` of `CaCO_(3)` `therefore` The degree of hardness `=251`ppm

Discussion

21.	One amu is equal to :-A. `1.57 xx 10^(-24) kg`B. `1.66 xx 10^(-24) kg`C. `1.99 xx 10^(-23) kg`D. `1.66 xx 10^(-27) kg`
Answer» Correct Answer - A

Discussion

22.	What is the mass of oxygen that is required for the complete combustion of 2.8 kg ethylene :-A. 2.8 kgB. 6.4 kgC. 96 kgD. 9.6 kg
Answer» Correct Answer - D `C_(2)H_(4)+3O_(2) to 2CO_(2)+2H_(2)O` `(2.8)/(28)xx10^(3)` 100 mol `n_(o_(2))req`. = 300mol `W_(O_(2))` req`.=300xx32=9.6` kg

Discussion

23.	Volume occupied one molecule of water `(density = 1g cm^(-3))` is :-A. `3.0 xx 10^(-23) cm^(3)`B. `5.5 xx 10^(-23) cm^(3)`C. `9.0 xx 10^(-23) cm^(3)`D. `6.023 xx 10^(-23) cm^(3)`
Answer» Correct Answer - A

Discussion

24.	The density of water is 1g/mL. Water is the volume occupied by 1 molecule of water ?A. `3xx10^(-23)`B. `1xx10^(-23)`C. `2xx10^(-23)`D. `4xx10^(23)`
Answer» Correct Answer - A `W_(H_(2)O)` 1molecule` = 18xx1.66xx10^(-24)`g `V_(H_(2)O)` 1molecule` = 18xx1.66xx10^(-23)` mL `=3xx10^(-23)` mL

Discussion

25.	Phenol on treatment with diethyl sulphate in presence of `NaOH` givesA. PhenetoleB. AnisoleC. Diphenyl etherD. Sodium benzene sulphonate.
Answer» Correct Answer - A

Discussion

26.	Phenol on treatment with diethyl sulphate in presence of `NaOH` givesA. PhenetoleB. AnisoleC. Diphenyl etherD. Diethyl ether.
Answer» `2C_6H_5OH+(CH_3CH_2)SO_4overset(NaOH)to` `2C_6H_5OH-underset("Phenetole")(O-CH_2CH_3+Na_2SO_4`

Discussion

27.	When ethyl hydrogen sulphate is heated with excess of alcohol at 410 K, the product obtained isA. EthaneB. EthyleneC. Diethyl etherD. Diethyl sulphate.
Answer» Correct Answer - C

Discussion

28.	A: ________ is responsible for all this confusion? B: It may be Jack. A) How B) Why C) WhoD) Whom
Answer» Correct option is C) Who

Discussion

29.	A: ________ do you go there? B: To visit some friends. A) When B) Why C) What D) Where
Answer» Correct option is B) Why

Discussion

30.	A: ____ did you go there? B: To visit some friends. A) When B) Why C) How D) What
Answer» Correct option is B) Why

Discussion

31.	I spent ____ time studying for the test. A) a lot of B) hours of C) a few D) not much
Answer» Correct option is A) a lot of

Discussion

32.	They have been good friends ____ 1978. A) for B) in C) since D) before
Answer» Correct option is C) since

Discussion

33.	David has been ____ for three hours. A) working B) to work C) worked D) not work
Answer» Correct option is A) working

Discussion

34.	The process of leaching alumina, using sodium carbonate is called _______. (A) Baeyer’s process (B) decomposition (C) cyanide process (D) Hall’s process
Answer» (D) Hall’s process

Discussion

35.	I can’t find my book ____ . A) everywhere B) not here C) where D) anywhere
Answer» Correct option is D) anywhere

Discussion

36.	I can’t find that book ________ . A) everywhere B) where C) not hereD) anywhere
Answer» Correct option is D) anywhere

Discussion

37.	On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7 minutes, it will be _______.(A) 1 (B) 2 (C) 3 (D) 4
Answer» (B) 2 amperes Q = It ∴ I = \(\frac{Q}{t} = \frac{840}{7\times60}\) = 2 amperes

37.

On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7 minutes, it will be _______.(A) 1 (B) 2 (C) 3 (D) 4

Answer»

(B) 2 amperes

Q = It

∴ I = \(\frac{Q}{t} = \frac{840}{7\times60}\)

= 2 amperes

Discussion

38.	I know it is here ________ . A) anywhere B) everywhere C) somewhere D) in
Answer» Correct option is C) somewhere

Discussion

39.	Do you know a good place ________ we can have lunch? A) somewhere B) where C) anywhere D) there
Answer» Correct option is B) where

Discussion

40.	Helen is wearing a jacket ________ is red. A) it B) as red C) that D) such
Answer» Correct option is C) that

Discussion

41.	Statement-I: Pig iron can be obtained from cast Iron.Statement-II: Cast iron has least carbon content(a) Both Statement I and Statement II are correct.(b) Both Statement I and Statement II are incorrect.(c) Statement I is correct, but Statement II is incorrect.(d) Statement I is incorrect, but Statement II is correct.
Answer» (b) Both Statement I and Statement II are incorrect. Cast iron is made from pig iron Wrought iron has least carbon content Both S-I and S-II are false

41.

Statement-I: Pig iron can be obtained from cast Iron.Statement-II: Cast iron has least carbon content(a) Both Statement I and Statement II are correct.(b) Both Statement I and Statement II are incorrect.(c) Statement I is correct, but Statement II is incorrect.(d) Statement I is incorrect, but Statement II is correct.

Answer»

(b) Both Statement I and Statement II are incorrect.

Cast iron is made from pig iron

Wrought iron has least carbon content

Both S-I and S-II are false

Discussion

42.	“Which of these films have you seen?” My friend asked me which of the films _______. A) have I seen B) I had seen C) you had seen D) have you seen
Answer» Correct option is B) I had seen

Discussion

43.	I was so ______ by the news that I don’t know what to say. A) admired B) marveled C) amazed D) wondered
Answer» Correct option is C) amazed

Discussion

44.	“Whom did you see at the concert last night?” She asked us whom _______ the other night. A) I’d seen B) we’d seen C) we saw D) I saw
Answer» Correct option is B) we’d seen

Discussion

45.	An aqueous glucose solution has boiling point of `374.19K`. Another aqueous glucose solution has a freezing point of `272.22K`. Find the molality ratio of two solution. Boiling point and freezing point of `H_(2)O373.15K` and `273.15K` respectively.
Answer» Correct Answer - 4 `DeltaT_(0)=k_(b).m_(1) DeltaT_(r)=k_(f).m_(2)` `(T_(b))_(s)-T_(b)^(O)=k_(b)=k_(b).m_(1) T_(f)^(O)-(T_(f))_(s)=k_(f).m_(2)` `374.19-373.15=0.52xxm_(1)rarr`(A) `273.15-272.22=1.86xxm_(2)rarr` (B) `((1))/((2))implies(1.04xx1.86)/(0.93xx0.52)=(1.9344)/(0.4836)=4`

Discussion

46.	They asked, “Is the work going to be easy?” They wondered if _____. A) was work going to be easy B) the work is going to be easy C) the work was easy D) the work was going to be easy
Answer» Correct option is D) the work was going to be easy

Discussion

47.	He asked “Have you read The old Man and the Sea, Ted?” He wanted to know if _______ The old Man and the Sea. A) I’d read B) he’d read C) I have read D) he has read
Answer» Correct option is B) he’d read

Discussion

48.	The boy ______ up his seat to the old lady. A) made B) gave C) came
Answer» Correct option is B) gave

Discussion

49.	To get into a building or car using force is to ______. A) break out B) break down C) break in
Answer» Correct option is C) break in

Discussion

50.	To steal money from a bank by using force is a ______. A) hold in B) hold down C) hold up
Answer» Correct option is C) hold up

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

At what temperature range most of the metals becomes superconductors

Which point defect lowers the density of a crystal?

Stomach acid is a solution of HCl with concentration of 2.2 × 10–3 M. what is the pH of stomach acid : (A) 3.92 (B) 2.65 (C) 4.92 (D) 1.92

10^-8 M HCl विलयन का Ph होगाA. 7B. 6.98C. 6D. 8

0.1 M HCN विलयन का Ka 1x10^-7 है इस विलयन का Ph होगाA. 4B. 5C. 2D. 1

Magnetic separation process may be used fro the concentration of :A. chalcopyriteB. bauxiteC. haematiteD. calamine

Main funcation of roasting isA. To remove volatile sunstancesB. OxidationC. ReductionD. Slag formation

Which of the following is not an ore of magnesium?A. MagnesiteB. DolomiteC. GypsumD. Carnallite

Which of the following matels cannot be extracted by carbon reducation process?A. `Pb`B. `A1`C. `Hg`D. `Zn`

(iii) Which is not a basic flux ?A. `CaCO_(3)`B. LimeC. `SiO_(2)`D. `CaO`

(h) In froth process, the ore particles float because their surface is ____.A. they are light.B. they are insolubleC. they are chargedD. they are hydrophobic

(h) In froth process, the ore particles float because their surface is ____.A. they are light.B. they are insolubleC. their surface is perferentially wetted by oil.D. they bear an electrostatic charge.

(g) An ore of tin containing `FeCrO_(4)` is concentrated by ____.

(h) In froth process, the ore particles float because their surface is ____.

In electrorefining, the impure metal is made _____.

Coating of zinc on iron objects is commonly known as _____.

The conductivity of a saturated solution of `BaSO_4` is ` 3. 06 xx 10^(-6) "ohm"^(-1) cm^(-1)` and its equivalent conductance is `1.53 "ohm"^(-1) cm^2 equiv^(-1)`. The `K_(sp)` for `BaSO_4` will be .A. `4 xx 10^-6`B. `2.5 xx 10^-9`C. `2.5 xx 10^-13`D. `4 xx 10^-12`

10 g of hydrogen and 64 g of oxygen were filled in a steed vessel and exploded. Amount of water produced in this reaction will be :-A. 2 moleB. 3 moleC. 4 moleD. 1 mole

A compound is analyzed and found to consist of 50.4% Ce,15.1% N and 34.5% O by mass. What is the correct formula for the compound ? (Atomic wt. of Ce = 140)A. `Ce_(2)(NO_(3))_(2)`B. `Ce_(2)(NO_(2))_(3)`C. `Ce(NO_(3))_(2)`D. `Ce(NO_(2))_(3)`

`100 mL` of a sample of hard water requires `25.1 mL` of `0.02 N H_(2)SO_(4)` for complete reaction, The hardness of water ( density `1g//mL)` is:A. 200 ppmB. 250 ppmC. 251 ppmD. 258 ppm

One amu is equal to :-A. `1.57 xx 10^(-24) kg`B. `1.66 xx 10^(-24) kg`C. `1.99 xx 10^(-23) kg`D. `1.66 xx 10^(-27) kg`

What is the mass of oxygen that is required for the complete combustion of 2.8 kg ethylene :-A. 2.8 kgB. 6.4 kgC. 96 kgD. 9.6 kg

Volume occupied one molecule of water `(density = 1g cm^(-3))` is :-A. `3.0 xx 10^(-23) cm^(3)`B. `5.5 xx 10^(-23) cm^(3)`C. `9.0 xx 10^(-23) cm^(3)`D. `6.023 xx 10^(-23) cm^(3)`

The density of water is 1g/mL. Water is the volume occupied by 1 molecule of water ?A. `3xx10^(-23)`B. `1xx10^(-23)`C. `2xx10^(-23)`D. `4xx10^(23)`

Phenol on treatment with diethyl sulphate in presence of `NaOH` givesA. PhenetoleB. AnisoleC. Diphenyl etherD. Sodium benzene sulphonate.

Phenol on treatment with diethyl sulphate in presence of `NaOH` givesA. PhenetoleB. AnisoleC. Diphenyl etherD. Diethyl ether.

When ethyl hydrogen sulphate is heated with excess of alcohol at 410 K, the product obtained isA. EthaneB. EthyleneC. Diethyl etherD. Diethyl sulphate.

A: ________ is responsible for all this confusion? B: It may be Jack. A) How B) Why C) WhoD) Whom

A: ________ do you go there? B: To visit some friends. A) When B) Why C) What D) Where

A: ____ did you go there? B: To visit some friends. A) When B) Why C) How D) What

I spent ____ time studying for the test. A) a lot of B) hours of C) a few D) not much

They have been good friends ____ 1978. A) for B) in C) since D) before

David has been ____ for three hours. A) working B) to work C) worked D) not work

The process of leaching alumina, using sodium carbonate is called _______. (A) Baeyer’s process (B) decomposition (C) cyanide process (D) Hall’s process

I can’t find my book ____ . A) everywhere B) not here C) where D) anywhere

I can’t find that book ________ . A) everywhere B) where C) not hereD) anywhere

On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7 minutes, it will be _______.(A) 1 (B) 2 (C) 3 (D) 4

I know it is here ________ . A) anywhere B) everywhere C) somewhere D) in

Do you know a good place ________ we can have lunch? A) somewhere B) where C) anywhere D) there

Helen is wearing a jacket ________ is red. A) it B) as red C) that D) such

“Which of these films have you seen?” My friend asked me which of the films _______. A) have I seen B) I had seen C) you had seen D) have you seen

I was so ______ by the news that I don’t know what to say. A) admired B) marveled C) amazed D) wondered

“Whom did you see at the concert last night?” She asked us whom _______ the other night. A) I’d seen B) we’d seen C) we saw D) I saw

An aqueous glucose solution has boiling point of `374.19K`. Another aqueous glucose solution has a freezing point of `272.22K`. Find the molality ratio of two solution. Boiling point and freezing point of `H_(2)O373.15K` and `273.15K` respectively.

They asked, “Is the work going to be easy?” They wondered if _____. A) was work going to be easy B) the work is going to be easy C) the work was easy D) the work was going to be easy

He asked “Have you read The old Man and the Sea, Ted?” He wanted to know if _______ The old Man and the Sea. A) I’d read B) he’d read C) I have read D) he has read

The boy ______ up his seat to the old lady. A) made B) gave C) came

To get into a building or car using force is to ______. A) break out B) break down C) break in

To steal money from a bank by using force is a ______. A) hold in B) hold down C) hold up