$ 1.\,\,{{H}_{3}}P{{O}_{3}}+P{{H}_{3}} $ $ 2.\,\,{{H}_{3}}P{{O}_{4}}+P{{H}_{3}} $ $ 3.\,\,P{{H}_{3}}+{{P}_{2}}{{O}_{5}} $ $ 4.\,\,{{H}_{3}}P{{O}_{3}}+{{P}_{2}}{{O}_{5}} $ Solution: $...
How many tertiary carbon atoms and primary carbon atoms respectively are present in 2-iodo-3, 3-dimethyl pentane?
2,4 0,4 2,3 1,3 Solution: 0,4 We can represent 2-iodo-3, 3-dimethyl pentane as follows: ${{H}_{3}}C-CH(I)-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-C{{H}_{3}}$ As we can see that there are zero carbon atoms...
Which of the following reagents is used to avoid further oxidation of aldehydes?
$ 1.\,\,{{C}_{5}}{{H}_{5}}N{{H}^{+}}Cr{{O}_{3}}Cl $ $ 2.\,\,{{K}_{2}}C{{r}_{2}}{{O}_{7}}/dil.\,{{H}_{2}}S{{O}_{4}} $ $ 3.\,\,dil.\,HN{{O}_{3}} $ $ 4.\,\,Cr{{O}_{3}} $ Solution: $...
Which of the following compounds is used to avoid oxidation in food?
O-hydroxy benzoic acid Acetyl Salicylic acid Ethyl Salicylate Butylated hydroxy Anisole Solution; Butylated hydroxy Anisole Butylated hydroxyanisole (BHA) is an antioxidant made up of...
Solve equations using factorization method: x + 1/x = 2.5
Given condition, \[x\text{ }+\text{ }1/x\text{ }=\text{ }2.5\] \[x\text{ }+\text{ }1/x\text{ }=\text{ }5/2\] Taking LCM on L.H.S, we have \[\left( x2\text{ }+\text{ }1 \right)/x\text{ }=\text{...
cot x = 3/4, x lies in third quadrant
It is given that We can compose it as We realize that We can compose it as Subbing the qualities Here x lies in the third quadrant so the worth of sec x will be negative We can compose it...
List the names of three electrical gadgets used in your house. Write their power, voltage rating and approximate time for which each one is used in a day. Hence find the electrical energy consumed by each in a month of 30 days.
Which of the following combinations have the same equivalent resistance between X and Y?
In figure (a), the resistors are connected in parallel between X and Y. Let R' be the resistance they have in common. 1 / R' now equals 1 / 2 + 1 / 2 = 2 / 2 ohm ohm ohm ohm ohm o [1] R' = 1 ohm In...
Fig. below shows the I-V characteristic curves for two resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.
The resistors in graphs (a) and (b) are non-ohmic and ohmic, respectively. The I-V graph for (a) is a curve, but the I-V graph for (b) is a straight line or linear.
Give two differences between an ohmic and non-ohmic resistor
Ohmic resistor It follows Ohm's law, which states that V / I is constant for all V or I values. At a given temperature, the slope of the V-I graph is the same for all values of V or I. Non-ohmic...
What are non-ohmic resistors? Give one example and draw a graph to show its current-voltage relationship.
Non-ohmic resistors (also known as non-linear resistances) are conductors that do not obey Ohm's law. LEDs, solar cells, junction diodes, and other similar devices are examples.
Draw a I-V graph for a linear resistor. What does its slope represent?
A linear resistor's I-V graph Slope of the I-V graph: I / V is the slope of the I-V graph. ΔI / ΔV is the reciprocal resistance of the conductor i.e. Slope = ΔI / ΔV = 1 / resistance of the...
Define the term resistance. State its S.I. unit.
The obstruction offered to the flow of current by the conductor is known as its resistance. The S.I. unit of resistance is Ohm.
(a) State whether the current is a scalar or vector? What does the direction of current convey?
(b) State whether the potential is a scalar or vector? What does the positive and negative sign of potential convey?
(a) Current is a scalar quantity. The direction of current conveys that the electrons flow opposite to the direction of flow of current. (b) Potential is a scalar quantity. The positive sign of...
Frogs are beneficial for mankind, justify the statement.
It is an important part of the food chain. it help farmers by eating insects and pest and protect him from insect infection. It is also used as a food source for humans in some regions around the...