Question # 1

In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.

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8

16

12

20

Lithium shows diagonal relationship with

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Beryllium

Sodium

Magnesium

Calcium

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

Acid rain effects

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Human being

Crops

Aquatic life

All above

Example of peseudohalonge group.

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Cyanogen

Thiocyanogen

Selenocyanogen

All above

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

Increasing oxygen contents in oxyacids leads to.

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An increase in thermal stability

An increase in acid strength

A decrease in oxidizing power

All above

The total number of bond pairs around sulphur and total number of lone pairs around oxygen atoms in the Lewis structure of sulphate ion are respectively.

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4, 12

8,12

12,4

6 ,12

The fluoride tooth paste contains

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SnF2 and Sn2P2O7

NaF

CaF2

None of these

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

An element with atomic number 20 is placed in which period of the periodic table.

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1

2

3

4

Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.

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Both chromium metal ions are paramagnetic with 3 unpaired electrons.

[Cr(NH3)6)3+ is calculated directly form the energy of yellow light

For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+

The two complexes absorb their complementary colors.

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

In 1952 who popularized the use of CFT for inorganic chemist

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Bethe

Orge

Van Vleck

Werner

In nature nickel is found in the form of.

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Sulphides

Silicates

Arsenides

All

The shape of SO₄^2-ion is.

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Tetrahedral

Trigonal planar

Square planar

Octahedral

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Sodium silicate is used

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In the paint industry

For fixing labels to glass

In a soap industry

All above

Artificial nitrogen fixation may occur by the formation of.

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Nitric acid

Ammonia

Nitrides

Any of above

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