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But-1-ene and but-2-ene are examples of ___

Define hygroscopic , efflorescence , deliquenscene

Why does dry HCl gas does not produce any change in dry litmus paper?

So if zinc + sulphuric acid 👉 Hydrogen gas.................................... so do Pumpkin or dark chocolate + Acid rain also gives Hydrogen

What would have happened if electron fell into the nucleus of an atom

Is it true that lithium needs less energy to knock off an electron from its outermost orbit than helium? And why?

NaH reacts with water to give

When quick lime is put in water it starts boiling vilolently? Why it happens.

The correct ground state electronic configuration of sodium is:

If the half cell reaction $A+e^{-}\to A^{-}$ has a large negative reduction potential, then which of the following is true?

__ are the atoms of different element with same mass number but different atomic number.

Give the inter-relationship of methane, methyl alcohol, formaldehyde and formic acid with conditions.

LPG ahs 60% propane and 40% butane ; 10 litres of this mixture is burnt. CAlculate the volume of carbonidioxide added to atmosphere.
$C_3{H}_8+5O_2\to 3C{O}_2+4H_{2}O2C_4{H}_{10}+13O_2\to 8C{O}_2+10H_{2}O$

The reaction of zinc with hot concentrated caustic alkalis involve the liberation of

The salt whose aqueous solution will turn blue litmus to red is :

(a) ammonium sulphate

(b) sodium acetate

(c) sodium chloride

(d) potassium carbonate

What are alkali metals? Give two examples. [2 MARKS]

Which of the following has the least bond angle?

Which element has the largest atomic size in the second period?

Iron sheets are cleaned with hydrochloric acid before dipping into molten zinc for galvanizing. Why?

What does soaps consists of

Convert and identify the type of reaction

1 when aqueous solution of calcium chloride is mixed with aqueous solution of Ammonium carbonate

2 ferric oxide is heated with aluminium metal to form Ion of Aluminium oxide

3 when hydrated f e s o4 ._.6H₂O is heated to form ferric oxide Sulphur dioxide and sulphur trioxide

Write the number of vertical columns in the modern periodic table. What are those columns called?

The balanced chemical equation for potassium reacting with water is:

Ethanol on oxidation gives

Match the following molecular formula

Which of the following does a protein yield on hydrolysis?

Explain clearly how conc. $H_{2}S{O}_4$ is used as dehydrating as well as drying agent.

A metal less reactivethan Hydrogen and another metal more reactive than hydrogen are
(a) aluminium and lead (b) iron and magnesium

(c) copper and tin (d) copper and mercury

The modern-day construction is called RCC construction. RCC stands for:

Name a carbon containing molecule which has two double bonds .

Zinc oxide is a metallic oxide . Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide (b) a basic oxide (c) an amphoteric oxide (d) a neutral oxide

The hybridisation of atomic orbitals of nitrogen in ${N{O}_2}^{+}$, ${N{O}_3}^{-}$ and ${N{H}_4}^{+}$ are:

The electrolytic conductance of 0.01M solution of acetic acid is 0.000163Scm^-1 at 298K. Calculate the degree of dissociation of acetic acid.

Blister copper contains___ % of pure copper.

A solution turns phenolphthalein indicator pink. The most likely pH of this solution will be :

(a) 6

(b) 4

(c) 9

(d) 7

The compound given is a/an

Cmplete and balance the following equations:
(a) $Na+O_2⟶$
(b) $N{a}_{2}O+H_{2}O⟶$
(c) $Fe\left(s\right)+H_{2}O\left(g\right)\stackrel{Redheat}{\to }$
(d) $Cu\left(N{O}_3{)}_2\right(aq)+Zn(s)\to$

What is POLAR BOND ??

and

What is POLAR COVALENT BOND ??

Which chemical is known as the king of chemicals?

$BaC{l}_2\left(aq\right)+N{a}_{2}S{O}_4\left(aq\right)\to BaS{O}_4\left(ppt\right)+2NaCl\left(aq\right)$

What is the colour of precipitate formed?

Which of the following has the maximum nonmetallic character?

Unsaturated carbon compounds undergo _____ reactions with hydrogen in the presence of palladium or nickel catalyst.

Why do ionic compound have high melting point

Which metal do not corrode easily

What are alloys

Identify the hydroxide which is soluble in excess of NaOH

Give the common and IUPAC names of the following alcohols: [3 MARKS]

(i) ${\text{CH}}_3\text{OH}$

(ii) ${\text{CH}}_3{\text{CH}}_2\text{OH}$

(iii) ${\text{CH}}_3{\text{CHOHCH}}_3$