UP PGT Chemistry Mock Test - 10 - UPTET MCQ

The correct answer is Option C.

Mass % of H2SO4=29%
Therefore 100g solution contains 29g H2SO4
​
Let the density of solution (in g/ml) is d
Molarity of solution :

Hence the answer is 1.22g/ml.
 

Electron gain enthalpy values of noble gases are positive because they have stable electronic configuration and thus have no tendency to take additionalelectron.

Here all compounds except in option c are achiral. So automatically option c is correct.

CO₂ is not secondary pollutant.

The correct answer is Option B.

Enzymes are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction. The molecules that an enzyme works with are called substrates. The substrates bind to a region on the enzyme called the active site. There are two theories explaining the enzyme-substrate interaction.
 

Sodium forms a basic oxide because it is a metal. Metals generally form basic oxides because they tend to donate electrons to oxygen atoms. In the case of sodium, when it reacts with oxygen, it forms sodium oxide, in which each sodium atom donates one electron to oxygen. This results in the formation of sodium ions (Na+) and oxide ions (O₂-), which can combine to form the ionic compound sodium oxide. Sodium oxide is basic because it can react with water to form a solution of sodium hydroxide, a strong base.

Energy of one photon
Energy supplied by one mole photon in KJ/mole = 3.11×6×10⁻¹⁹×6×10²³×10⁻³=297KJ/mole
% of energy converted to K.E.= 

NaHCO₃ + NaOH   Na₂CO₃ + H₂O

Acidic  Base hydrogen

The correct answer is  Option A.
The concentration of the reactant decreases from 0.8M to 0.4M in 15 minutes, i.e. t_1/2 = 15 minutes. Therefore, the concentration of the reactant will fall from 0.1M to 0.025M in two half lives. i.e.    2t_1/2 = 2 × 15 = 30 minutes.

If (2s-2p) mixing is not operative, then

Cerium, a rare earth metal, was initially placed in the 'rare earths' group in Mendeleev's Periodic Table. Mendeleev organized elements into groups based on their similar chemical properties, and cerium was grouped with other rare earth elements due to its similar behavior.

Hard water has hardness = 200 ppm Thus, 10⁶ mL(= 10³ L)water has CaC0³ =200 g =2 mol

It is believed that Noble gases don't form (or rather don't easily form bonds). This way only Van der Waals radius is measured.

The rationale here is based on the fact that noble gases have very low chemical reactivity and their atomic radii are non bonded.

(III) is most reactive as it has most acidic β-H as well as it gives resonance stabilised alkene.Next to (III) is (IV) as it is tertiary. (I) is less reactive than (II) because (I) gives less substituted alkene.

Hydrogen is the most abundant element in the universe, accounting for about 75 percent of its normal matter, and was created in the Big Bang.

Since, A is completely saturated, it must contain more than one chiral carbon atoms in order to show both enantiomerism and diastereomerism. Also, C on ozonolysis gives D (C₅H₁₀O) as one product, other product must be CH₃SHO. Hence, C must be 

The Group II elements are powerful reducing agents. A reducing agent is the compound that gets oxidised in the reaction and, therefore, loses electrons.

M = Mg, Ca, Sr,Ba --> I will be using 'M' as the general symbol for a Group II element in this topic. 

The non metallic character decreases down the group.And we know the oxides of non-metal r acidic in genral.Hence acidic character of oxides decreases down d group. Down the group the size of the element increases, electronegativity decreases ,metallic character increases and hence the acidic character decrease.

Water has a maximum density at 4-degree centigrade, this is because at 4-degree centigrade, as opposite forces are in balance that is like the formation of Ice and maintaining of the liquid phase of water. Any less than 4-degree centigrade or greater than 4-degree centigrade, the water density is lesser than that of 4-degree centigrade.

CH₃CH₂OH is in liquid state due to association as a result of intermolecular H-bonding.

When same quantity of electricity is passed, elements/gases are formed in the ratio of their equivalents
.

The correct answer is option D.
Pair of enantiomers react differently with pure enantiomers of other compounds.
 

As you move down a periodic table group, electronegativity decreases because the distance between the atomic nucleus and the valence electrons increases.

Cs is electropositive element hence, it forms Cs+ ion. Hence, no covalent bonding.

Cs⁺ has stable inert gas configuration thus, Cs³⁺ is not formed.