Daily NEET MCQ- August 22, 2022 - NEET MCQ

The molecule NH₃ has a lone pair and 3 bond pairs. As we know that the repulsion order is as follows: Lone pair-Lone pair is greater than Lone pair-Bond pair is greater than Bond pair-Bond pair. So the shape of molecule NH₃ is trigonal pyramidal, where the lone pair is away from the 3 bond pairs.

The concept of mixing of atomic orbitals and formation of new hybridized atomic orbitals for the pairing of electrons through chemical bonds. Therefore sp³d hybridization included 5 orbitals namely 1 s-orbital, 3 p-orbitals, and 1 d-orbital.

The water molecule H-O-H has an arrangement of electrons in a tetrahedral. As it contains two bond pairs and lone pairs in the form of the molecule of type AB₃E₂, it’s shape is bent i.e. neglecting the lone pairs.

Here we use the second equation of motion. s = ut + (1/2)at². In a uniformly accelerated motion, the acceleration remains constant. Therefore, the equation for displacement becomes the equation of a parabola.

Acceleration = dv/dt. To find the acceleration, we can differentiate the velocity equation with respect to time. a = 2 + 10t. On putting, t = 10, we get a = 102.

Negative acceleration is known is deceleration. Negative acceleration acts in the direction opposite to the direction of motion. It is also known as retardation.

Sporophyte contains mainly of three parts capsule, seta and foot. Capsule is the portion of sporophyte that bears spores and seta is the part that transfers water and nutrients from gametophyte to capsule.

Haploid gametophyte is the dominant phase in the life cycle of liverworts. Diploid sporophyte, diploid zygote and diploid spores are short living intermediary structures that finally result in gametophyte.

Zygote is formed by fusion of male and female gametes and is diploid in nature. Zygote doesn’t undergo reduction division immediately after fusion. They instead form a structure called as sporophyte. Sporophyte undergoes meiosis to produce spores. Spores germinate to form new thallus.

Pituitary, pineal, thyroid, adrenal, pancreas, parathyroid, thymus, and gonads are the organised endocrine bodies in our body. The endocrine glands and their hormones constitute the endocrine system.