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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 28701. |
It’s 7.30. A) Yes, it’s half past seven. B) Yes, the clock is half past seven. C) Yes, it’s half past eight. D) Yes, the clock is half past eight. |
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Answer» Correct option is A) Yes, it’s half past seven |
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| 28702. |
316 is ________ . A) three hundred and sixteen.B) three hundred sixteen. C) three hundred and sixty. D) three hundred sixty. |
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Answer» Correct option is A) three hundred and sixteen |
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| 28703. |
Find the rate of change of radius of a sphere when its radius is `4 cm` and when its volume is changing at the rate of `(4pi)/(625)m^(3)//sec`A. `1m//s`B. `2m//s`C. `pim//s`D. `3m//s` |
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Answer» Correct Answer - A `V=(4)/(3)piR^(3)` `(dV)/(dt)=4piR^(2)(dR)/(dt)` `rArr(4pi)/(625)=4pi xx(4)/(100)xx(4)/(100)xx(dR)/(dt)` `rArr(dR)/(dt)=1m//s` |
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| 28704. |
It’s 21.00. A) Yes, it’s nine in the evening. B) Yes, it’s nine clocks. C) Yes, it’s nine in the afternoon. D) Yes, it’s nine hours. |
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Answer» Correct option is A) Yes, it’s nine in the evening. |
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| 28705. |
1. Choose the appropriate question tag and fill in the blank. Kindness is a great human qualityA) don't itB) does itC) isn't itD) is it. |
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Answer» c) isn't it hope it helps c) isn't it explanation:the sentence here is positive with the auxiliary verb 'is'
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| 28706. |
What was the purpose of the visit to antarctica |
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Answer» A visit to Antarctica and witnessing the geological phenomena, such as the drifting of land masses, glaciers receding and ice shelves collapsing makes us understand that global warming is a real threat. Hence, to study the earth’s past, present and future, these factors make Antarctica the best place to go. |
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| 28707. |
Consider following statement `:-` `(A)` any physical quantity may have more one unit. `(B)` Any physical quantity have only one dimensional formula `(C )` More than one physical quantities may have same dimension. `(D)` We can add & subtract only those expression having same dimension. Number of correct statements is `:-`A. `4`B. `3`C. `2`D. `1` |
| Answer» Correct Answer - B | |
| 28708. |
164 is ________ . A) hundred sixty four. B) a hundred sixty four. C) hundred sixty and four. D) a hundred and sixty four |
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Answer» Correct option is D) a hundred and sixty four. |
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| 28709. |
Who are those boys? One is my brother and ________ . A) the big boy is Peter. B) a big boy is Peter. C) the big boy is a Peter. D) a big boy is a Peter. |
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Answer» Correct option is A) the big boy is Peter. |
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| 28710. |
Do Mr. and Mrs. Smith speak English? A) He does but she doesn’t. B) He speak but she doesn’t. C) He do but she don’t. D) He speak but she don’t. |
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Answer» Correct option is A) He does but she doesn’t. |
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| 28711. |
A: _____ languages can Mrs. Brown speak? B: English & Irish. A) How B) What C) Why D) Where |
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Answer» Correct option is B) What |
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| 28712. |
A: Do Mr. and Mrs. Smith speak French? B: ____ . A) He does, but she doesn’t B) He speaks, but she doesn’t speak C) He speaks, but she isn’t D) He is, but she doesn’t |
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Answer» Correct option is A) He does, but she doesn’t |
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| 28713. |
I am not a teacher give question tag |
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Answer» “I am a teacher, aren't I?” |
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| 28714. |
What drink is made of yoghurt and water? |
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Answer» Correct answer is ayran |
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| 28715. |
Assertion: The stunted unlucky heir of twisted bones is reciting a father‘s gnarled disease. Reason: The boy has been born with polio. A) A is true but B is false B) A is false but B is true C) Both A and B are true but B is the correct explanation of A D) Both A and B are true but B is not the correct explanation of A |
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Answer» C) Both A and B are true but B is the correct explanation of A |
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| 28716. |
The graph shown the variation with times `t` of the velocity `v` of an object . Which one of the following graphs best represents the variation of acceleration `a` of the object with time `t`? B. C. D. |
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Answer» Correct Answer - D Ans. `(4)` Acceleration `a=(dv)/(dt)` and slope of a parabolic curve is a straight line. |
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| 28717. |
Smelting is the process of heating the ore with magnesium. |
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Answer» Correct Answer - F Smelting is the extraction of a metal from its oxide ore by a process involving melting. |
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| 28718. |
Levigation is generally employed for concentration of sulphide ores. |
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Answer» Correct Answer - F For sulphide ores, generally froth flotation process is employed. |
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| 28719. |
Alkali metals can be obtained by chemical reduction of their compounds. |
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Answer» Correct Answer - F As alkali metal are the strongest reducing agent, they cannot be obtained by chemical reduction of their compounds. |
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| 28720. |
In calcination, ore is heated strongly in the absence of air |
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Answer» Correct Answer - F In calcination, ore is heated in absence or limited supply of air. |
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| 28721. |
Reactive metals occur in native state. |
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Answer» Correct Answer - F Reactive metals occur in the combined state in nature. |
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| 28722. |
Both iron and aluminium combine slowly with oxygen at room temperature. Why is this reaction a problem for iron but not for aluminium? |
| Answer» Aluminium, on reacting with oxygen forms an impervious coat of `Al_2O_3` which protects the metal from further corrosion. In contrast, iron forms iron rust `(Fe_2O_3.xH_2O)` which flakes off exposing fresh surface to corrosion. | |
| 28723. |
Can iron be purified by amalgamation? |
| Answer» No, iron cannot be purified by amalgamation as iron does not form an amalgam. | |
| 28724. |
Why do some metals occur in the native state? |
| Answer» Metal like Ag, Au and Pt which are not reactive, i.e., do not react with oxygen `O_2` moisture `H_2O` and `CO_2` present in air, occur in the native state. | |
| 28725. |
What is a mineral? How does it differ from an ore? |
| Answer» Natural materials in which the metal occurs in the earth are called minerals. The minerals from which the metal is conveniently and economically extracted is called an ore. Hence all ores are minerals, but all minerals are not ores. | |
| 28726. |
What type of ores are roasted? |
| Answer» Sulphide ores are roasted to convert them oxides, as oxides are more easily reduced to metals than sulphides. | |
| 28727. |
Which of the following are correct reactions ?A. `2Fe+Al_(2)O_(3) to 2Al+Fe_(2)O_(3)`B. `ZnO+C to Zn +CO`C. `Cr_(2)O_(3)+2Al to Al_(2)O_(3)+2Cr`D. `2[Ag(CN)_(2)]^(1-)+Zn to 2Ag +[Zn(CN)_(4)]^(2)` |
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Answer» Correct Answer - B::C::D Except for (a) all other are correct reactions. |
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| 28728. |
For the metallurgical process of which of the ores,calcined ore can be reduced by carbon ?A. haematiteB. calamineC. iron pyritesD. sphalerite |
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Answer» Correct Answer - A::B Both haematite and calamine can be reduced by carbon. |
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| 28729. |
Which of the following function is of no significance for roasting sulphide ores to the oxide and not subjecting the sulphide ores in carbon reduction directly ?A. `CO_(2)` is more volatile than `CS_(2)`B. Metal sulphides are thermodynamically more stable than `CS_(2)`C. `CO_(2)` is thermodynamically more stable than `CS_(2)`D. Metal sulphides are less stable than the correcponding oxides. |
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Answer» Correct Answer - B Metal sulphides reduction with carbon is not possible since `Delta_(f) G^(Ө)` for the reaction is not compensated. |
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| 28730. |
Complex formation for cyanide method is used for the extraction ofA. CuB. FeC. HgD. Ag |
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Answer» Correct Answer - D `Ag_(2)S + 4NaCN rarr 2Na[Ag(CN)_(2)] + Na_(2) S` `2Na[Ag(CN)_(2)]+ Zn rarr 2 Ag + Na_(2)[Zn(CN)_(4)]`. |
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| 28731. |
The least stable oxide at room temperature isA. ZnOB. CuOC. `Sb_(2)O_(3)`D. `Ag_(2)O` |
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Answer» Correct Answer - D `Ag_(2) O` decomposes on simple heating. |
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| 28732. |
In sulphation roasting of `ZnS` products areA. `ZnO +ZnSO_(4) +SO_(2)`B. `ZnO+SO_(2)`C. `ZnCI_(2)`D. `Zn+SO_(2)` |
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Answer» Correct Answer - A Due to incomplete `ZnSO_(4)` is formed. |
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| 28733. |
How many carboncations are more stable than benzycarbocation `Ph-Coverset(o+)(H)_2` ? |
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Answer» Correct Answer - 6 `1^(st),3^(rd),5^(th),6^(th),8^(th),9^(th)` |
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| 28734. |
`PhOHunderset(Me_2SO_4)overset(NaOH)toP` In given reaction product P is :A. `Ph-O-SO_2OMe`B. `PhOMe`C. `PhOSO_2OPh`D. `PhMe` |
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Answer» Correct Answer - B `Ph-OHoverset(Theta)overset(OH)toPhoverset(Theta)Ooverset(Me_2SO_4)toPhOMe` |
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| 28735. |
Out of the following the number of metals that can not be obtained by electrolysis of the aqueous solution of their sals are `Ag,Mg,Cu,Al,Au,Ca,Na` |
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Answer» Correct Answer - 4 `Mg,Cl,Ca,Na` |
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| 28736. |
Which common name is wrong ?A. B. C. D. |
| Answer» Correct Answer - 4 | |
| 28737. |
Relation between Neopentane and `n-` pentane is ?A. HomologuesB. Chain isomerC. Position isomersD. No relation |
| Answer» Correct Answer - 2 | |
| 28738. |
At constant temperature, the equilibrium constant `(K_(p))` for the decomposition reaction `N_(2)O_(4) hArr 2NO_(2)` is expressed by `K_(p)=4x^(2)p//(1-x^(2))`, where p=pressure x= extent of decomposition. Which of the following statements is true?A. `K_(p)` increases if pressure is increasedB. `K_(p)` increases if x is increasedC. `K_(p)` decreases if pressure is decreasedD. `K_(p)` would remain same with change in pressure. |
| Answer» Correct Answer - 4 | |
| 28739. |
One end of an unstretched vertical spring is attached to the ceiling and an object attached to the other end is slowly lowered to its equilibrium position. If S is the gain in spring energy and G is the loss in gravitational potential energy in the process, thenA. `S=G`B. `S=2G`C. `G=2S`D. none of these |
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Answer» Correct Answer - C At equilibrium position `x=(mg)/k` `U_("spring")=1/2kx^(2)=1/2k((mg)/k).x=(mgx)/2` `=1/2` (loss in G.P.E) `impliesG=2S` |
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| 28740. |
Point out of the following Incorrect Griganard synthesis.A. B. C. D. |
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Answer» Correct Answer - A,B,D A, B and D are incorrect Grignared synthesis. |
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| 28741. |
ASSERTION - in high spin situation the configuration of d5 ions will be t2g3 eg2 REASON- in high spin situation pairing energy is less than crystal field splitting energy a). Both assertion and reason are true, and reason is the correct explanation of assertion. b). Both assertion and reason are true, but reason is not the correct explanation of assertion. c). Assertion is true but reason is false. d). Both assertion and reason are false. |
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Answer» c). Assertion is true but reason is false. |
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| 28742. |
the answer is D but pls tell the reasons. |
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Answer» The correct option is D Because it is a anti aromatic compound and it also have maximum angle strain |
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| 28743. |
Consider the following complexes (I) `[Cr(CO)_(x)]`, (II) `[Cr(CO)_((x-1))PF_(3)]` If `PF_(3)` is better `pi` accepter than CO, what be the order of bond length of CO in complexes (I) and (II) :A. `IgtII`B. `IIgtI`C. I=IID. can not be compared |
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Answer» Correct Answer - A If `PF_(3)` is better `pi` acceptor than Co, than C-O bond order in II complex is more than I complex and the C-O bond order in II complex is more than I complex and the C-O bond length in `IgtII`.] |
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| 28744. |
Which of the following is not square planar ?A. `[PtCl_(4)]^(-2)`B. `[Pt(CN)_(4)]^(-2)`C. `[NiCl_(4)]^(-2)`D. `[PdCl_(4)]^(-2)` |
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Answer» Correct Answer - C `[NiCl_(4)]^(-2)` has `sp^(3)` hybridised state due weak field nature of `Cl^(-)ion` but `Pt^(2+)andPd^(2+)(4^(th)and5^(th)` trasition series) pairing of electron takes place irrespective of nature of ligand resulting in square planar complexes. ] |
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| 28745. |
The reduction potential of hydrogen half cell will be negative if :A. `P_(H_(2))=1 "atm" and [H^(+)]=1.0 M`B. `P_(H_(2))=2 "atm" and [H^(+)]=2.0 M`C. `P_(H_(2))=2 "atm" and [H^(+)]=1.0 M`D. `P_(H_(2))=1 "atm" and [H^(+)]=2.0 M` |
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Answer» Correct Answer - C `2H^(+)+2e^(-) to H_2` `therefore RP=0.0-(0.059)/2 "log" (P_(H_2))/([H^+]^2)` |
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| 28746. |
Isopropyl methyl ether when treated with cold hydrogen iodide givesA. isopropyl iodide and methyl iodideB. isopropyl alcohol and methyl iodideC. isopropyl alcohol and methyl alcoholD. isopropyl iodide and methyl alcohol |
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Answer» Correct Answer - B `underset("Isopropyl methyl ether")(CH_(3)-overset(CH_(3))overset(|)CH-O)-CH_(3) overset("cold HI")to underset("Isopropyl alc.")(CH_(3)-overset(CH_(3))overset(|)(CH_(2)OH) + underset("Methyl Iodide")(CH_(3)I)` |
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| 28747. |
Which element among the following does form `Ppi - Ppi` multiple bonds?A. ArsenicB. NitrogenC. PhosphorusD. Antimony |
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Answer» Correct Answer - B E.C. of N is `to 1s^(2), 2s^(2), 2p_(x)^(1) 2p_(y)^(1) 2p_(z)^(1)` The structure of `N_(2)` . Triple bond is made be one `sigma` and two `pi` bonds. |
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| 28748. |
Ethyl iodide reacts with sodium methoxide to form ethyl ether. It is example ofA. `S_(N)1` reactionB. `S_(N)2` reactionC. Substitution reactionD. Elimination reaction. |
| Answer» Correct Answer - B | |
| 28749. |
An oxidising agent is a substance which can (a) Gain electrons (b) Lose an electronegative radical (c) Undergo decrease in the oxidation number of one of its atoms (d) Undergo any one of the above changes |
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Answer» (d) Undergo any one of the above changes |
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| 28750. |
In the disproportionation reaction, which of the following statements is not true? (a) The same species is simultaneously oxidised as well as reduced (b) The reacting species must contain an element having at least three oxidation states (c) The element in the reacting species is present in the lowest oxidation state (d) The element in the reacting species is present in the intermediate oxidation state |
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Answer» (c) The element in the reacting species is present in the lowest oxidation state. |
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