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Which among the following solids is a nonpolar solid ? A. Hydrogen chloride B. Sulphur dioxide C. Water D. Carbon dioxide

The electric charge in non-polar materials is distributed uniformly across the molecule. Carbon dioxide, benzene, methane, and diatomic gases (N2,O2,Cl2)... View Article

The correct order of bond angle (1) PF₃<PC_l3<PBr₃<PI₃ (2) PI₃<PC_l3<PBr₃<PF₃ (3) PF₃<PBr₃<PC_l3<PI₃ (4) PF₃<PC_l3<PI₃<PBr₃

Phosphorus has a 3 outer shell. The outermost shell comprises a total of five electrons, with two electrons in 3s... View Article

In a compound atom of element ‘Y’ form CCP lattice and those of element ‘X’ occupy 2/3rd of tetrahedral voids. The formula of the compound will be- (A)- X₂Y₃ (B)- X₂Y (C)- X₃Y₄ (D)- X₄Y₃

Y atom occupies the CCP lattice, hence the effective number of Y atoms = 4 (As the effective number of... View Article

Is glycine optically inactive?

Answer: Yes Explanation The chiral amino acid glycine is the only one having a single hydrogen atom in its side... View Article

Compare the ionising powers of α:β:γ particles. A. 10²:10⁴:1 B. 10¹:10⁴:10² C. 10⁴:10²:1 D. None of these

Answer: (c) Explanation Let’s start with a definition of α:β:γ particles. An alpha, beta , or gamma particle is emitted... View Article

The solubility of alkali metal hydroxide is: A)LiOH

Answer: (a) Explanation Alkali hydroxides are chemical compounds that contain an alkali metal cation as well as a hydroxide anion.... View Article

What is the total number of alkenes possible by debromination of 3 – Bromo – 3 – cyclopentylhexane using alcoholic KOH?

In the provided question, we must determine the total number of alkenes that will be formed when bromine is removed... View Article

Among the following oxides how many of them are amphoteric oxides (A) BeO (B) SnO (C) ZnO (D) Al₂0₃

Amphoteric materials include aluminium oxide, beryllium oxide, tin oxide, and zinc oxide. They react both as a basic and as... View Article

A soft silver metal (A) burns with a golden yellow flame to give a yellow powder (B) which on treatment with water liberates oxygen giving a clear solution (C). The solution placed on Al attacks this metal liberating a gas (D) and forming a water soluble compound (E). The metal (A) dissolves in liq. NH3 to form a deep blue solution which is a good conductor and an excellent reducing agent. Identify C.

Sodium is a soft silver metal (A) that burns with a golden yellow flame to produce a yellow powder. Sodium... View Article

State true or false. KMnO4 in acidic medium is always reduced to Mn²⁺

True Explanation when potassium is added to an acidic solution, the permanganate (VII) is reduced to its (pale pink) +2... View Article

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 gram of polymer of molar mass 185000 in 450 ml of water at 37∘C.

The expression of osmotic pressure is given below: π=icRT Where π is the osmotic pressure, i is the van’t Hoff... View Article

In which of the following equilibrium, Kc and Kp are not equal? (A) 2C(s) + O₂(g) ⇌ 2CO(g) (B) 2NO(g) ⇌ N₂(g) + O₂(g)< (C) SO₂(g)+NO₂(g) ⇌ SO₃(g) + NO(g) (D) H₂(g) +I₂(g) ⇌ 2HI(g)

Answer: (a) Explanation Kc and Kp are both equilibrium constants. Kc is measured in terms of molar concentration of reactants... View Article

How many structural formulas are possible when one of the hydrogen is replaced by a chlorine atom in anthracene? (A) 3 (B) 7 (C) 4 (D) 6

Answer: (a) Explanation The molecular formulae of structural isomers are same, but their structures are not. The number of atoms... View Article

Is there peroxide linkage present in h2so5?

To determine whether a compound contains peroxide bonds, consider the oxidation number of a central metal in the compound. If... View Article

Which among the following is the heaviest? A. One mole of oxygen B. One molecular of sulphur trioxide C. 100 amu of uranium D. 44g of carbon dioxide

Answer: (d) Explanation 44g of CO2 44g of CO2= 1 mole = 44g Hence, the heaviest among all of them... View Article

Number of possible spectral lines which may be emitted in Brackett series in H-atom if the electrons in ninth excited state returns to ground state are: A 5 B 45 C 6 D 21

The Brackett series is the emission or absorption lines produced by electron jumps between the fourth and higher energy levels... View Article

Equal weights of mercury and iodine are allowed to react completely to form a mixture of mercurous and mercuric iodine leaving none of the reactants. The ratio by mole of Hg₂I₂ and HgI₂ formed (Hg=200, I=127) is:

Number of moles of atom/molecule =wt(gram)atomic.wt/molecular.wt The number of moles of atom or molecule is given by weight in grams... View Article

Vapour phase refining is used for which of the following elements?

The vapour phase refining technique is used for the refining of nickel, titanium and zirconium metals. Impure nickel metal is... View Article

Among alkali metal halides minimum melting point of chlorides is: (A) LiCl > NaCl > KCl > CsCl (B) LiCl > NaCl > CsCl > KCl (C) NaCl > KCl > CsCl > LiCl (D) LiCl > NaCl > CsCl > KCl

on moving down the group of alkali metals, with increase in the size of the alkali metal cation, the melting... View Article

Soft drinks bottles and baby feeding bottles are generally made up of ____.

Polystyrene Explanation It is a synthetic thermoplastic polymer made up of styrene. It can easily be moulded and is generally... View Article

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