2020 MHT-CET PCB SET - 01 — MHT - CET STD 12 Science — Question

Identify the product obtained when benzamide is treated with bromine and aqueous sodium hydroxide?

Read the following statements and select the correct option.

Statement I: Some snails and fish undergo hibernation to avoid summer heat.

Statement II: Polar bears undergo hibernation in winters as they are unable to migrate

The rate at which the metal cools in moving air is proportional to the difference of temperatures between the metal and air. If the air temperature is 290 K and the metal temperature drops from 370 K to 330 K in 1 O min, then the time required to drop the temperature upto 295 K.

Select the CORRECT match:

	I		II
i.	Competition	a.	Lichen
ii.	Commensalism	b.	Sea anemone and clownfish
iii.	Mutualism	c.	Lions and Leopards

The solution of the differential equation `(y^2 + xy^2)dx/dy + x^2 - yx^2 = 0` is ______

Identify the chromosome number of the endosperm in the following case. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12.

Study the following statements and select the correct option.

Statement I: Holandric genes are present on Y chromosome. Statement II: Holandric genes are always inherited from father to son.

Identify the products that are NOT produced using fermentation technology.

Curd, Ghee, Relaxin, Vinegar, Insulin, Yoghurt, Cheese, Wine, Erythropoietin

What is the sum total of all the population in a given habitat?