List of practice Questions

The electronic configurations of four elements A, B, C, D are given below:
(A) 1s22s22p63s1
(B) 1s22s22p63s23p1
(C) 1s22s22p63s2
(D) 1s22s22p63s23p2

If the distance travelled by a freely falling body in the last but one second of its motion is 5 m, then the last second is:

Which of the following property is less for D₂O than H₂O?

Match the following:

List-I (Sol)	List-II (Method of preparation)
A) \( \text{As}_2\text{S}_3 \)	I) Bredig's arc method
B) \( \text{Au} \)	II) Oxidation
C) \( \text{S} \)	III) Hydrolysis
D) \( \text{Fe(OH)}_3 \)	IV) Double decomposition

Which of the following sets are correctly matched?

Molecule	Hybridization	Geometry
I. BrF₅	sp³d²	square pyramidal
II. XeF₆	sp³d³	Distorted octahedral
III. SF₄	dsp²	square planar
IV. PbCl₂	sp	linear

A solution is prepared by adding 124 g of ethylene glycol (molar mass = 62 g mol\(^{-1}\)) to \( x \) g of water to get a 10 m solution. What is the value of \( x \) (in g)?

KMnO\(_4\) oxidises hydrogen sulphide in acidic medium. The number of moles of KMnO\(_4\) which react with one mole of hydrogen sulphide is

Three plants, Mustard, Calotropis, and Guava, are collected. There are 30 nodes in Mustard, 30 nodes in Calotropis, 25 nodes in Guava are present. Find the number of leaves put together in all three plants?

Loss of chlorophyll leading to yellowing in leaves is called:

Choose the incorrect statements:

I. Electrons from NADH produced in the mitochondrial matrix are oxidized by complex II
II. Ubiquinones oxidised to ubiquinol by receiving reducing equivalents from complex I
III. Ubiquinol oxidized to ubiquinone by transfer of electrons to complex III

In which crosses both phenotypic and genotypic F$_2$ ratios are 1:2:1?

I) Red $\times$ White snapdragon (incomplete dominance)
II) Tall $\times$ Dwarf garden pea
III) Dotted $\times$ Spotted seed coat lentil
IV) Homozygous $\times$ Heterozygous

S.No.	Cranial nerves	Arises from ...	Ends in ...
I.	Olfactory nerves	Olfactory epithelium of nasal chambers	Temporal lobes of cerebrum
II.	Optic nerves	Retina of eyes	Cerebellum
III.	Auditory nerves	Internal ears	Cerebrum
IV.	Pathetic nerves	Floor of mid brain	Superior oblique muscle of eye ball

Table 1: List of Cranial Nerves: Their Origins and End Points

Choose the incorrect statement among the following

Assertion (A): Genetic maps are extensively used as a starting point in the Human genome sequencing project.
Reason (R): Frequency of recombination between gene pairs on the same chromosome as the measure of distance between genes and mapped their position is called gene mapping.

Match the following

Match the following

In root nodules of legumes, Leg-haemoglobin is important because

The measurement of the overall diversity for different ecosystems within an ecological region is

In cockroach, thermoreceptor sensillae are located on

Study the following statements and pick up the incorrect statements.
I. Oriented locomotor movement of an organism towards or away from the direction of light is called photokinesis.
II. The influence of light on non-directional movement of organisms is called phototaxis.
III. UV-B and UV-C rays are more harmful than UV-A rays.
IV. Photoperiod influences the migration of birds.

Statement-I: In articular cartilages, perichondrium is present.
Statement-II: Intervertebral discs contain fibrous cartilage.
Identify the correct option from the following:

Number of flagella in Giardia

Consider the following Statement-I: Alkali metals dissolve in liquid ammonia and form deep blue solutions.
Statement-II: The order of melting and boiling points of alkali metal halides follow the trend:
Fluoride< chloride< bromide< iodide.

In a hydraulic lift, if the radius of the smaller piston is \(5 \ \text{cm}\), and the radius of the larger piston is \(50 \ \text{cm}\), then the weight that the larger piston can support when a force of \(250 \ \text{N}\) is applied to the smaller piston is

A cc camera is fabricated using a semiconducting material having a band gap of 3 eV. The wavelength of light it can detect is nearly