Recent questions


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 4 days ago in General Knowledge by anonymous

What class of compounds do the oxygen based compounds of sulphur represent?
A)-Acids
B)-Bases
C)-Neutral oxides
D)-Amphoteric
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Which of the following reactions is exothermic?
A)-Photosynthesis
B)-Combustion
C)-Ethanoic acid + sodium carbonate
D)-Ammonium nitrate + water
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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
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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 4 days ago in General Knowledge by anonymous

Solvent extraction is more good if repeated extractions are done using_______
A)-large solvent
B)-small solvent
C)-extra solvent
D)-normal solvent
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Part of suspensor that helps in food absorption is
A)-Hypophysis
B)-Haustorium
C)-Basal cell
D)-Intermediate cells
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An element consists of | Chemistry Questions
A)-one type of particle
B)-two types of particles
C)-many types of particles
D)-no particle
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Which one of the following is a chain growth polymer?
A)-Glyptal
B)-Nylon-6,6
C)-Nylon -6
D)-Polypropylene
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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.
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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?
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All noble gases are colourless and odourless.
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Which one of the following is a pure substance?
A)-Tap water
B)-Rock
C)-Air
D)-Elemental oxygen
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The bromination of ethane, is an example of:
A)-addition reaction
B)-reduction reaction
C)-elimination reaction
D)-substitution chain reaction
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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
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When force of attraction decreases electron affinity ________
A)-remains same
B)-increases
C)-decreases
D)-doubles
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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
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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
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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
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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 4 days ago in General Knowledge by anonymous
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