List of practice Questions

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 nervesArises from ...Ends in ...
I.Olfactory nervesOlfactory epithelium of nasal chambersTemporal lobes of cerebrum
II.Optic nervesRetina of eyesCerebellum
III.Auditory nervesInternal earsCerebrum
IV.Pathetic nerves Floor of mid brainSuperior 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
Identify the set containing purine and pyrimidine base of DNA respectively.

The correct statement about the product of the following reaction is: 
\[ \text{CH}_3\text{CHO} \xrightarrow{(i)\ \text{C}_2\text{H}_5\text{MgBr}} \xrightarrow{(ii)\ \text{H}_2\text{O}} \text{product} \]

Identify the hydride which is not correctly matched with the example given in brackets.
What is 'Z' in the following reaction sequence? (Alcohol = colorless) $$ \mathrm{C_3H_6} \xrightarrow[\text{CCl}_4]{\mathrm{Br_2}} \mathrm{X} \xrightarrow[\Delta]{\text{i) KOH/alcohol} \\ \text{ii) NaNH}_2} \mathrm{Y} \xrightarrow[\mathrm{Hg}^{2+}, \mathrm{H}^+]{333\,K} \mathrm{Z} $$
A polymer sample contains 10 molecules each with molecular mass 5,000 and 5 molecules each with molecular mass 50,000. The number average molecular mass of the polymer sample is
If a wheel starting from rest is rotating with an angular acceleration of $\pi$ rad s$^{-2}$, then the number of rotations made by the wheel in the 6th second is
Identify the correct option from the following: