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Home Questions & Answer Science Questions & Answers Chemistry Questions & Answers

Chemistry Questions & Answers (Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)

Rare gases are
Amono atomic
Bdi atomic

Ctri atomic
DNone of above

Identify the wrong statement in the following
AAtomic radius of the elements increases as one moves down the first group of the periodic table
BAtomic radius of the elements decreases as one moves across from left to right in the 2nd period of the
CAmongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius

DAmongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Which acid is present in lemon ?
Amarlic acid
Bcitric acid

Clactic acid
Dtartaric acid

Which is not a type of elements ?
AMetals
BNon Metals
CMetalloids
DGases

Who is regarded as father of modern chemistry ?
ARuterford
BEinstein
CLavoisier

DC.V. Raman

Green house gas is
ACarbon dioxide

BOxygen
CHydrogen
DNitrogen

The ground state energy of the electron in the hydrogen atom is 13.6 eV the energy of the state n=2 is
A13.6 eV
B6.8 eV
C4.5 eV
D3.4 eV

Gain of electron is
ACombustion
BDecomposition
COxidation
DReduction

What are the constituents of bronze?
ACopper and tin

BCopper and zinc
CCopper and iron
DZinc and iron

Critically observe the reaction and choose the correct RQ from the options given below. Find the correct RQ of this reaction is
A

Neoprene is a polymer of
AChloroprene

BIsoprene
CIsobutane
DIsopentane

Natural rubber is a polymer of
APropene
BIsoprene

CFormaldehyde
DPhenol

Which is used for moderator in the homogeneous nuclear reactor
AHeavy water

BRain water
CSea water
DWell water

An example of conducting polymer is
APolycarbonate
BPolyvinyl chloride
CPolyacetylene

DPolystyrene

The carbide that produces methane on hydrolysis is
AMgC2

According to Bronsted-Lowry, an acid is
AA proton donor

BA proton acceptor
CAn electron donor
DAn electron acceptor

The International Year of Chemistry was/is
A1999
B2009
C2010
D2011

Choose the correct order of increse inthe oxidation number of iodine in the following compounds I2,HI,HIO4 and ICI
AI2,HIO4 AND HIO4
BHI,HIO4,ICI,I2
CHI,I2,ICI,HIO4

DHIO4,ICI,I2,HI

Identify the odd one from the group of chemicals given below : BHC, DDT, 2,4-D, Urea
ABHC
BDDT
C2,4-D
DUrea

Which of the following is referred to as EMP pathway?
AGlycolysis

BElectron transport chain
CPentose phosphate pathway

The mixture present in the pencil lead is
ACarbon and Nitrogen
BCarbon and Oxygen
CCarbon and Clay

DCarbon and Glass

Which is the strongest acid
AHCOOH

BCH3 COOH
CC3H7COOH
DC3H5COOH

For a cell reaction : A(S) + 2B⁺<---> A²⁺ + 2B the equilibrium constant is found to be 10^12.ten the E° _cell value is
A0.354 V

The Compound is used as rocket propellant
AHydrazine

BNitric acid
CAmmonia
DNitrogen

The enzyme discovered by CSIR to increases shelf life of fruits and vegetables is
AKinase super oxidese
BEhtyl gluconase
CPhenyl aldolase
DSuper oxide dismutase

Photochemical smog is formed by
AO2,NO,H2O2 , organic peroxide etc

BConsists of mercury and lead
CConsists of NO2 and CO
DHydrocarbons

Which of the following known as complete fertilizer
ANitrogenous fertilizer
BPotash fertilizer
CNPK fertilizer

DNP fertilizer

_______ is called buckminster fullerence
ADiamond
BGraphite
CC60

DCoal

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