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Draw the electron dot structure of MgCl2.

The below diagram is the dot structure of MgCl2:... View Article

How to remove the hardness of water temporarily?

The hardness of water can be removed temporarily by adding calcium hydroxide.... View Article

Why SO2 can act as oxidising as well as reducing agent but H2S act as only reducing agent

In SO2, S is in oxidation state with +4 charge and the highest oxidation state is +6. So, it acts as both oxidising as... View Article

Among the following which is least acidic?

Among the following, which is least acidic? phenol p-chlorophenol p-nitrophenol o-cresol The correct option is iv. o-cresol... View Article

Draw the structure of O3 and NO2

The structure of O3 is: The structure of NO2 is:... View Article

Is Aluminium a metal or metalloid? Justify with suitable reasons.

Aluminium is a metal because of the following reasons: It is a good conductor of heat and electricity. It is hard, ductile, malleable, and... View Article

The outer shell configuration of the most electronegative element is

The outer shell configuration of the most electronegative element is: ns2np3... View Article

The electronic configuration of gadolinium atomic no 64 is

(a) [Xe] 4f3 5d5 6s2 (b) [Xe] 4f6 5d2 6s2 (c) [Xe] 4f8 5d9 6s2 (d) [Xe] 4f7 5d1 6s2 The electronic configuration of Gd atomic no 64 is [Xe]... View Article

Explain hunds rule with an example

Hunds rule states that in a sublevel, each orbital is singly occupied before it is doubly occupied. The electrons present in singly occupied... View Article

Tabulate the differences in the characteristics of states of matter

Solid, liquid and gas are the three states of matter. The condition of the matter is one of the distinct forms that the various phases of the... View Article

calculate the molecular mass of chloroform chcl3 atomic masses C=12u, H=1u and Cl=35.5u

The molecular mass of chloroform CHcl3 is Given: C = 12 H=1 Cl = 35.5×3 12+1+106.5 = 119.5 u... View Article

The volume of 1.0 g of hydrogen at NTP is

The volume of 1.0 g of hydrogen at NTP is 11.2 L... View Article

The mass of a molecule of water is : (1) 3 x 10-25 kg (2) 3 x 10-26 kg (3) 1.5 x 10-26 kg (4) 2.5 x 10-26 kg.

option (2) 3 x 10-26 kg... View Article

solder is an alloy made up of

Solder is a fusible metal alloy made up of 60% tin and 40% lead.... View Article

What is the mass of 0.5 mole of ozone molecule? (A) 8 g (B) 16 g (C) 24 g (D) 48 g

Option (C) 24 g... View Article

The main constituent of CNG is ______. Select one: a. Ethane b. Methane c. Propane d. Butane

Option b. Methane... View Article

an alloy contains 40% copper, 32% nickel and rest zinc. find the mass of zinc in one kilogram of the alloy.

Given: The alloy contains 32% of copper 40% of nickel Remaining zinc Mass of alloy = 1kg = 1000 grams Mass of copper in alloy = (1000/100)... View Article

calculate the number of moles of helium present in 52g of helium

The molar mass of Helium =4g The given mass of Helium =52g Thus the number of moles of Helium =given mass/molar mass =52/4 =13 moles... View Article

Write five uses of melamine plastic

Melamine plastic is used in the manufacturing of Electrical Parts, Household Goods, Laminates, Military Applications, kitchenware products, floor... View Article

What are the molecular shapes of SF₄, CF₄, and XeF₄? (1) same with 1,1, and 1 lone pair of electrons respectively (2) same with 2,0, and 1 lone pair of electrons respectively (3) different with 1,0, and 2 lone pair of electrons respectively (4) different with 0,1, and 2 lone pair of electrons respectively

Answer: (3) different with 1,0, and 2 lone pairs of electrons respectively SF4 - sp3d, trigonal bipyramidal with one lone pair at the equatorial... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30