Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Which is incorrect statement?
In earth’s crust, sulphur exists as
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The element used in the production of photocells and solar cells and also used in xerox machines is
The number of bond pairs and lone pairs in rhombic sulphur molecule are
Which has lowest bond energy (single bond)?
Harmful UV radiations emitted from the sun are prevented from reaching the earth by the presence of ozone in the
Point out the incorrect statement among the following.
The correct order of thermal stability of the hydrides of group 16 elements is
Increasing order of oxidation number of oxygen is found in
Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.
Q. Which of the following property do not increase down the group from oxygen to polonium?
The correct statements among the following are
Which of the following statements regarding ozone are correct?
The correct statements among the following are
Which of the following do not stick to the poles of a magnet?
Direction (Q. Nos. 16 and 17) This section contains a paragraph, each describing theory, experiments, data, etc. Two questions related to the paragraphs have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).
Passage
Sulphur and the rest of the elements of 16th group are less electronegative than oxygen. They can acquire ns2np6 by sharing two electrons with the atoms of other elements and thus, exhibit +2 oxidation state in their compounds, in addition to this, atoms have vacant d-orbitals in their valence shell due to which electrons I can be promoted from the s- and p-orbitals of the same shell. As a result, they can show +4 and +6 oxidation states. The oxidation states of elements never exceed +6.
Q.
Oxidation states of sulphur in H2S2O7 and H2S2O8 respectively are
Passage
Sulphur and the rest of the elements of 16th group are less electronegative than oxygen. They can acquire ns2np6 by sharing two electrons with the atoms of other elements and thus, exhibit +2 oxidation state in their compounds, in addition to this, atoms have vacant d-orbitals in their valence shell due to which electrons I can be promoted from the s- and p-orbitals of the same shell. As a result, they can show +4 and +6 oxidation states. The oxidation states of elements never exceed +6.
Q.
Like sulphur, oxygen does not show +4 and +6 oxidation states .The reason is
Direction (Q. Nos. 18-20) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Q.
Match the Column I with Column II and mark the correct option from the codes given below.
Match the Column I with Column II and mark the correct option from the codes given below.
Match the Column i with Column II and mark the correct option from the codes given below.
Direction (Q. Nos. 21-24) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).
Q.
Number of chemicals that produce dioxygen on heating
KCIO3, (NH4)2 Cr2O7, NH4NO3, NaNO3, KMnO4, K2Cr2O7, H2O2, Pb3O4, NH4NO2
In the fully excited state, number of unpaired electrons in tellurium are
Number of chemical species having bent shape in
Among the following compounds, the number of compounds which have oxidation states of S is +4 ?
PbS, SO2, SF6, Na2S2O3, H2SO3
Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.
Q.
Statement I : Oxygen is more electronegative than sulphur, yet H2S is acidic, while H2O is neutral.
Statement II : H— S bond is weaker than O—H bond.
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