List of practice Questions

In diamond, each carbon atom is bonded to four other carbon atoms tetrahedrally. The number of carbon atoms per unit cell is

In diborane, banana bond is formed between

In dicot stems, cambium present between primary xylem and primary phloem is

In dilute aqueous solution HF is a weaker acid than HI because

In comparing Dows process and Raschigs the common factor is

In computing a measure of the central tendency for any set of 51 numbers, which one of the following measures is well-defined but uses only very few of the numbers of the set?

In crystal structure of sodium chloride, the arrangement of $Cl^-$ ions is

In $CsCl$ type structure, the co-ordination number of $Cs^+$ and $Cl^-$ respectively are :

In Cuscuta the nodes give rise to special roots which penetrate the host tissue upto

In chromium chloride $ {(CrCl_{3}), Cl^{-}}$ ions have cubic close packed arrangement and $ {Cr^{3+}}$ ions are present in the octahedral holes. The fraction of the total number of holes occupied is

In colloidal state, particle size ranges from

In case of alkaline earth metals, the oxidation state of more than two is not observed because

In case of the hydrides $H_2O, H_2S, H_2Se$ and $H_2$ Te the acid strength of aqueous solution of equimolar concentration

In $ccp$ arrangement the pattern of successive layers can be designated as

In certain respects, lithium differs from other alkali metals, The main reason for this is

In Chlamydomonas, the life cycle is

In Bryophyllum, the buds developing in lateral notches are

In Calotropis, phyllotaxy of leaves is

In Bougainvillea, weak stems rise up a support by clinging to it with the help of curved thorns, such plants are called as

In breathing movements, air volume can be estimated by

In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 ? $10^{-18} J$ from the radiation of 600 nm, calculate the number of photons received by the detector.

In benzilic acid rearrangement

In biolistic method of gene transfer, the microparticles coated with foreign DNA are bombarded into target cells at a very high velocity. These microparticles are made up of

In apoplast pathway, water moves exclusively through the

In aquatic plant Ranunculus flabellaris (buttercup), submerged leaves are highly dissected whereas the emerged leaves are broad and lobed. This is an example of