List of practice Questions

Wildlife refers to
Why is the electron gain enthalpy of $O$ or $F$ less than that of $S$ or $Cl$?
Why is partial roasting of sulphide ore done in metallurgy of copper?
With increase in temperature the viscosity of
Wires A and B are made from the same material. A has twice the diameter and three times the length of B. If the elastic limits are not reached, when each is stretched by the same tension, the ratio of energy stored in A to that in B is
With respect to the fungal sexual cycle, choose the correct sequence of events.
With propagation of longitudinal waves through a medium, the quantity transmitted is
Wolframite is separated from cassiterite by
Within elastic limit, which of the following graphs correctly represents the variation of extension in the length of a wire with the external load?
Within each transition series, the oxidation states
With rise in temperature, the Young?? modulus of elasticity
World's most problematic aquatic weed is
$ (x^2 + xy) dy = (x^2 + y^2) dx$ is
Wurtz reaction is used to unite
Write the converse of the following statement. If you do all the exercises in the book, you get an $A$-grade in the class.
$X$ mL of $H_2$ effuse through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is
$??? Identify correct statements about $X$, $A$, $B$, $C\, \&\, D$, which cause global warming. i. $??? ii. ????ombines with oxygen to produce $??? iii. ??? iv. ????auses acid rain
Yeast cell divides once in approximately every
??X??s a part of respiratory system that contains C-shaped rings of hyaline cartilage.??X??s lined with ciliated, pseudostratified columnar epithelium.Identify??X?
$XO$ type of sex determination and $XY$ type of sex determination are the examples of
Xenon best reacts with
X reacts with NaOH (aqueous solution) to form Y and $H_2$. Aqueous solution of Y is heated to 323- 333 K and on passing $ {CO_2}$ into it, $ {Na_2CO_3}$ and Z were formed. When Z is heated to $1200^{\circ}C , { Al_2O_3}$ is formed. X, Y and Z respectively are
Yolk sac develops in humans from
Yogurt and buttermilk are produced with the use of
Yellow light of wavelength $6000 ?$ produces fringes of width $0.8\, mm$ in Youngs double slit experiment. If the source is replaced by another monochromatic source of wavelength $7500 ?$ and the separation between the slits is doubled then the fringe width becomes