CBSE
Multiple Choice QuestionsIodine is tested by the following reagent :
starch
urea
glucose
glycerol
Assertion : SnI4 is an orange solid.
Reason : The colour arises due to charge transfer.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Ozone is an allotrope of oxygen.
Reason : Oxygen is bluish colour liquid and in singlet state it is more paramagnetic.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
How can you synthesize nitric oxide in the laboratory ?
Zinc with cold and dilute HNO3
Zinc with concentrated HNO3
Copper with cold and dilute HNO3
Heating NH4NO3
Difference in the melting and boiling points of inert gases is :
large
small
no difference
any of these
NaOCl is used as a bleaching agent and sterilising agent .It can be synthesized by the action of :
NaCl with H2O
NH4Cl with NaOH
Cl2 with cold and dilute NaOH
Cl2 with hot and concentrated NaOH
Assertion : Liquid NH3,is used for refrigeration.
Reason : Liquid NH3 quickly vapourises.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Bleaching powder reacts with dilute acids to evolve chlorine.
Reason : The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Tincture iodine is
aqueous solution of I2
solution of I2 in aqueous Kl
alcoholic solution of I2
aqueous solution of Kl.
Oxidation number of sulphur in H2S2O8 is :
+6
+8
+21
+7
