JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
The number of significant figures in \(50000.020 \times 10^{-3}\) is ..... .
- A \(5\)
- B \(8\)
- C \(2\)
- D \(10\)
Answer & Solution
Correct Answer
(B) \(8\)
Step-by-step Solution
Detailed explanation
\(\underline{50000.020} \times 10^{-3}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- `The vapour pressure vs. temperature curve for a solution solvent system is shown below.The boiling point of the solvent is \(........\,{ }^{\circ} C\)
JEE Mains 2023 Medium - The most abundant elements by mass in the body of a healthy human adult are : Oxygen \((61.4\%);\) Carbon \((22.9\%),\) Hydrogen \((10.0\%);\) and Nitrogen \((2.6\%).\) The weight which a \(75\, kg\) person would gain if all \(^1H\) atoms are replaced by \(^2H\) atoms is ....... \(kg\)JEE Mains 2017 Medium
- Choose the correct statements from the following. \(A\). \(\mathrm{Mn}_2 \mathrm{O}_7\) is an oil at room temperature \(B\). \(\mathrm{V}_2 \mathrm{O}_4\) reacts with acid to give \(\mathrm{VO}_2^{2+}\) \(C\). \(\mathrm{CrO}\) is a basic oxide \(D\). \(\mathrm{V}_2 \mathrm{O}_5\) does not react with acid Choose the correct answer from the options given below :JEE Mains 2024 Hard
- The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about \(9\). The spectral series areJEE Mains 2019 Medium
- Consider the following reactions.
\( PbCl_{2}+K_{2}CrO_{4}\rightarrow A+2KCl \)
(Hot solution)
\( A+NaOH\rightleftharpoons B+Na_{2}CrO_{4} \)
\( PbSO_{4}+4CH_{3}COONH_{4}\rightarrow(NH_{4})_{2}SO_{4}+X \)
In the above reactions, A, B and X are respectively.JEE Mains 2026 Hard - Which of the following properties will change when system containing solution 1 will become solution 2?
JEE Mains 2025 Easy
More PYQs from JEE Mains
- Water boils in an electric kettle in \(20\) minutes after being switched on. Using the same main supply, the length of the heating element should be _______ to _______ times of its initial length if the water is to be boiled in \(15\) minutes.JEE Mains 2024 Hard
- An acidic solution of dichromate is electrolyzed for \(8\) minutes using \(2\) \(A\) current. As per the following equation \(Cr _{2} O _{7}^{2-}+14 H ^{+}+6 e ^{-} \rightarrow 2 Cr ^{3+}+7 H _{2} O\) The amount of \(Cr ^{3+}\) obtained was \(0.104\, g\). The efficiency of the process(in\%) is (Take : \(F =96000\, C\), At. mass of chromium \(=52\) )JEE Mains 2020 Medium
- Let \(y=y(x)\) be solution of the following differential equation \(e^{y} \frac{d y}{d x}-2 e^{y} \sin x+\sin x \cos ^{2} x=0, y\) \(\left(\frac{\pi}{2}\right)=0\). If \(y(0)=\log _{e}\left(\alpha+\beta e^{-2}\right)\), then \(4(\alpha+\beta)\) is equal to \(....\)JEE Mains 2021 Hard
- Match List-\(I\) with List-\(II.\) Choose the correct answer from the options given below:
JEE Mains 2024 Hard - Let \(S _{1}, S _{2}\) and \(S _{3}\) be three sets defined as \(S _{1}=\{ z \in C :| z -1| \leq \sqrt{2}\}\) ; \(S _{2}=\{ z \in C : \operatorname{Re}((1- i ) z ) \geq 1\}\) ; \(S _{3}=\{ z \in C : \operatorname{Im}( z ) \leq 1\}\) Then the set \(S _{1} \cap S _{2} \cap S _{3}\)JEE Mains 2021 Hard
- Borazine, also known as inorganic benzene, can be prepared by the reaction of \(3-equivalents\) of " \(X\) " with \(6-equivalents\) of "\(Y\)"."\(X\)" and "\(Y\)", respectively are.JEE Mains 2022 Medium