All the enthalpy changes are________________?
All the enthalpy changes are________________?
A. Negative
B. Positive
C. May or may not be A or B
D. none
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Voltaic cell is a_________________?
Voltaic cell is a_________________?A. irreversible cell
B. reversible cell
C. alkaline cell
D. all of the aboveThe melting points and boiling points upto meddle of 3d- series ____________________?
The melting points and boiling points upto meddle of 3d- series ____________________?A. increases
B. decreases
C. remain same
D. no regular trendWhich of the following statements is false about transition metals?
Which of the following statements is false about transition metals?A. They form complexes
B. They show variable valency
C. All transition metal compounds are paramagnetic
D. They form coloured ionsAmylose is__________________?
Amylose is__________________?A. Soluble in water
B. Insoluble in water
C. Soluble in alcohol
D. Partially soluble in alcoholIn unsaturated hydrocarbons electrons favour___________________?
In unsaturated hydrocarbons electrons favour___________________?A. less reactivity
B. addition reactions
C. substitution reactions
D. noneWhich one is Chloroform_________________?
Which one is Chloroform_________________?A. CH2Cl2
B. CH3Cl
C. CHCl3
D. CCl4