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Which statement is correct for electromeric effect ?
Which statement is correct for electromeric effect ?
A)-It is a temporary effect.
B)-It is the property of (pi) bond.
C)-It take place in presence of reagent, i.e., electrophile or nucleophile.
D)-All of these.
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
organic chemistry - some basic principles and techniques
What class of compounds do the oxygen based compounds of sulphur represent?
What class of compounds do the oxygen based compounds of sulphur represent?
A)-Acids
B)-Bases
C)-Neutral oxides
D)-Amphoteric
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Which of the following reactions is exothermic?
Which of the following reactions is exothermic?
A)-Photosynthesis
B)-Combustion
C)-Ethanoic acid + sodium carbonate
D)-Ammonium nitrate + water
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
thermodynamics
internal energy as a state of system
Which of the following is greater for identical conditions and the same gas?
Which of the following is greater for identical conditions and the same gas?
A)-most probable speed
B)-average speed
C)-root mean square speed
D)-most probable and average speed have the same value
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
states of matter
kinetic energy and molecular speeds
A balloon contains a certain mass of neon gas. The temperature is kept constant, and the same mass of argon gas is added to the balloon. What happens?
A balloon contains a certain mass of neon gas. The temperature is kept constant, and the same mass of argon gas is added to the balloon. What happens?
A)-The balloon doubles in volume.
B)-The volume of the balloon expands by more than two times.
C)-The volume of the balloon expands by less than two times.
D)- The balloon stays the same size but the pressure increases.
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
some basic concepts of chemistry
law of chemical combinations
Solvent extraction is more good if repeated extractions are done using
Solvent extraction is more good if repeated extractions are done using_______
A)-large solvent
B)-small solvent
C)-extra solvent
D)-normal solvent
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Part of suspensor that helps in food absorption is
Part of suspensor that helps in food absorption is
A)-Hypophysis
B)-Haustorium
C)-Basal cell
D)-Intermediate cells
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 6
biology
getting to know plants
herbs
shrubs and trees
An element consists of | Chemistry Questions
An element consists of | Chemistry Questions
A)-one type of particle
B)-two types of particles
C)-many types of particles
D)-no particle
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Which one of the following is a chain growth polymer?
Which one of the following is a chain growth polymer?
A)-Glyptal
B)-Nylon-6,6
C)-Nylon -6
D)-Polypropylene
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 12
chemistry
polymers
classification of polymers
Out of the five figures given in each problem four are similar in a certain way. Choose the figure which is different from the other figures.
Out of the five figures given in each problem four are similar in a certain way. Choose the figure which is different from the other figures.
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Two identical ball bearings in contact with each other and resting on a frictionless table are hit head - on by another ball bearing of the same mass moving initially with a speed v as shown in figure.If the collision is elastic, which of the following is a possible result after collision?
Two identical ball bearings in contact with each other and resting on a frictionless table are hit head - on by another ball bearing of the same mass moving initially with a speed v as shown in figure.If the collision is elastic, which of the following is a possible result after collision?
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
All noble gases are colourless and odourless.
All noble gases are colourless and odourless.
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 12
chemistry
the p-block elements
group 18 elements
Which one of the following is a pure substance?
Which one of the following is a pure substance?
A)-Tap water
B)-Rock
C)-Air
D)-Elemental oxygen
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 9
chemistry
is matter around us pure
pure substances and mixtures
The bromination of ethane, is an example of:
The bromination of ethane, is an example of:
A)-addition reaction
B)-reduction reaction
C)-elimination reaction
D)-substitution chain reaction
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Wurtz reactions have low yield because of
Wurtz reactions have low yield because of ___________
A)-the formation of multiple products.
B)-reaction is reversible
C)-reagent used are impure
D)-none of these
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 12
chemistry
haloalkanes and haloarenes
reactions of haloalkanes
When force of attraction decreases electron affinity
When force of attraction decreases electron affinity ________
A)-remains same
B)-increases
C)-decreases
D)-doubles
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
classification of elements and periodicity in properties
trends in physical properties
Lithium is used | Chemistry Questions
Lithium is used ______ | Chemistry Questions
A)-to make ‘white metal’ bearings for motor engines
B)-in thermonuclear reactions
C)-to make electrochemical cells
D)-All of these
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
Which of the following reaction is used to increase the length of the carbon chain ?
Which of the following reaction is used to increase the length of the carbon chain ?
A)- Clemmensen reduction
B)-Wolff-Kishner Reduction
C)-Wurtz reaction
D)-Kolbe’s electrolysis
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 12
chemistry
haloalkanes and haloarenes
reactions of haloalkanes
The e/m value of electron is measured for the certain mass of electrons whose minimum value is:
The e/m value of electron is measured for the certain mass of electrons whose minimum value is:
A)-2 Kg
B)-1 Kg
C)-9 Kg
D)-6 Kg
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
structure of atom
discovery of subatomic particles
Consider the following compound If hybridization of 'C' is sp ( s + px ) and nodal plane of pi - bond present between C and S is 'XY' plane then which of the following statement(s) is/are CORRECT regarding given information for above compound.
Consider the following compound If hybridization of 'C' is sp ( s + px ) and nodal plane of pi - bond present between C and S is 'XY' plane then which of the following statement(s) is/are CORRECT regarding given information for above compound.
1
answer
asked
Oct 2, 2022
in
General Knowledge
by
anonymous
class 11
chemistry
some p-block elements
introduction to p-block elements
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