Gases responsible for green house effect are
Some gases that are responsible for the greenhouse effect are: Carbon dioxide CO2 Methane CH4 Water H2O Nitrous oxide NO... View Article
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Molecule having an incomplete octet in the central atom is a) H2O b) NH3 c) PCl5 d) BCl3
Option d) BCl3.
In ascidia testis is soft thick and transparent it is composed of a) Mucin b) Tunicirine c) Bilirubin d) Porphine
Option b) Tunicirine. Ascidians feature a tough outer tunic made of the polysaccharide cellulose.
Which factors determine the quality of the note a) frequency b) wavelength c) wave form d) time period
Option c) wave form. The quality of a note depends upon the waveform.
The solution of 642x−5=4×8x−5 is
Given: \(\begin{array}{l}64^{2x-4}=4*8^{x-5}\end{array} \) \(\begin{array}{l}2^{(6)(2x-5)}=2^{2}.2^{(3)x-5}\end{array} \) \(\begin{array}{l}2^{12x-30}= 2^{2+3x−15}\end{array} \) As the bases are same, powers must be equal. thus, 12x−30=3x−13 12x−3x=−13+30... View Article
Daily weather changes in the atmosphere are associated with ______. a) troposphere b) stratosphere c) ionosphere d) mesosphere
Option a) troposphere. Most of the weather related phenomenon takes place in this region and is the lowest layer of... View Article
What compound of sulphur is obtained when conc.HNO3 oxidises S8
\(\begin{array}{l}H_{2}SO_{4}\end{array} \) is produced. \(\begin{array}{l}S_{8}+48HNO_{3}\rightarrow8H_{2}SO_{4}+48NO_{2}+16H_{2}O\end{array} \)
Fill in the blank with the most appropriate word. She heard a ___ at the door and went to see who was outside. a) strike b) hit c) knock d) touch
Option c) knock.
Which of the following are limitations of range? a) It is not based on all the values. b) It can not be calculated for open-ended frequency distribution. c) As long as the minimum and maximum values remain unaltered, any change in other values does not affect range. d) All of these
Option d) All of these.
Prove the following sin(2π−x)=−sinx
sin (2π−x)=sin 2π sinx − cos 2π cosx =0 * sinx − 1 * cosx =0 − cosx= −cosx
Saprophytic plants lack a) Roots b) Chlorophyll c) Flowers d) Vascular tissues
Option b) Chlorophyll. Since they lack Chlorophyll, Saprophytic plants obtain energy from dead and decaying organisms.
Express your opinion about the use of DNA fingerprinting
The DNA sequences of any two individuals can be compared using DNA fingerprinting. 99.9% of the base sequences in all... View Article
What are twin primes? write all pairs of twin primes between 50 and 100
Twin primes numbers are pairs of prime numbers that differ by 2. Pairs of twin primes between 50 and 100... View Article
Last-in first-out method is suitable in times of __________. a) Fluctuating Prices b) Falling Prices c) Rising Prices d) None of these
Option c) Rising Prices. This method gives you the highest cost of goods sold and the lowest taxable income.
Anisotropic band is made of a) Elastin filaments b) Actin filaments c) Myosin filaments d) Both B and C
Option d) Both B and C.
Which compound is most soluble in water? a) Ethanal b) Chloroethane c) Ethanol d) Ethylene glycol
Option d) Ethylene glycol. Since more hydrogen bonds are seen in ethylene glycol, solubility in water is more.
Kranz type of anatomy is found in a) C4 plants b) C3 plants c) CAM plant d) C2 plants
Option a) C4 plants. C4 photosynthesis incorporates modified gene expression, metabolic specializations, and novel leaf anatomy.
Which of the following has the lowest ionization energy a) Nitrogen b) Fluroine c) Sulphur d) Oxygen
Option c) Sulphur. By losing one electron, sulphur can attain the half-filled state and hence achieve greater stability. Hence, sulphur... View Article
BIOS stands for ___. a) Binary Input Output System b) Basic Input Off system c) Basic Input-Output system d) All the above
Option a) Binary Input Output System.
Malachite is a mineral of: a) Aluminium b) Magnesium c) Iron d) Copper
Option d) Copper.
